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They can find prey without ever seeing it. | 0:00:14 | 0:00:17 | |
They can fly as silent as a ghost... | 0:00:19 | 0:00:21 | |
..and they can even see in the dark. | 0:00:24 | 0:00:26 | |
Owls have what appear to be genuine super-powers. | 0:00:33 | 0:00:37 | |
To understand their amazing abilities, | 0:00:39 | 0:00:42 | |
we're going to get closer than ever before. | 0:00:42 | 0:00:45 | |
Meet Luna and Lily. | 0:00:46 | 0:00:49 | |
Through the eyes of these fluffy little barn owl chicks... | 0:00:52 | 0:00:55 | |
-WOMAN: -You can fly! | 0:00:55 | 0:00:56 | |
..and their extraordinary family, | 0:00:56 | 0:00:58 | |
we'll reveal the magic behind these mysterious birds. | 0:00:58 | 0:01:03 | |
-You wouldn't want to be a vole now, would you? -No. | 0:01:06 | 0:01:08 | |
No, life as a vole would be brief. | 0:01:08 | 0:01:10 | |
And working with some of the world's leading scientists... | 0:01:10 | 0:01:13 | |
-There's not a sound. That is really impressive, isn't it? -Yup. | 0:01:13 | 0:01:17 | |
..we'll find out what gives owls their super-powered edge. | 0:01:17 | 0:01:22 | |
Owls live all over the world... | 0:01:47 | 0:01:49 | |
..from the frozen north... | 0:01:51 | 0:01:53 | |
..to scorched deserts. | 0:01:55 | 0:01:57 | |
With their familiar faces, these charismatic birds | 0:02:01 | 0:02:04 | |
have captured our imagination. | 0:02:04 | 0:02:06 | |
There are about 240 different species... | 0:02:10 | 0:02:13 | |
..and they appear to have conquered our planet. | 0:02:15 | 0:02:18 | |
They live on every continent, except Antarctica. | 0:02:21 | 0:02:24 | |
So, what are the secrets of their success? | 0:02:25 | 0:02:28 | |
Owls are birds of prey. | 0:02:30 | 0:02:31 | |
Like their cousins, the hawks, eagles, and falcons, | 0:02:33 | 0:02:37 | |
they have sharp talons... | 0:02:37 | 0:02:38 | |
..a curved beak | 0:02:40 | 0:02:42 | |
and a taste for small mammals. | 0:02:42 | 0:02:44 | |
But they also have a unique set of skills that set them apart. | 0:02:47 | 0:02:51 | |
Their superpowers. | 0:02:53 | 0:02:55 | |
To find out more, | 0:02:59 | 0:03:01 | |
we need to go beneath the surface... | 0:03:01 | 0:03:03 | |
..and start at the very beginning... | 0:03:16 | 0:03:19 | |
..when all of the potential for this remarkable bird | 0:03:23 | 0:03:26 | |
is held in one tiny egg. | 0:03:26 | 0:03:30 | |
After 30 days of incubation, | 0:03:33 | 0:03:35 | |
the chick inside is ready to make an appearance. | 0:03:35 | 0:03:38 | |
But it's a tough task. It can take 48 hours for an owlet | 0:03:39 | 0:03:43 | |
to break out of its protective shell. | 0:03:43 | 0:03:45 | |
What are you up to in there? | 0:03:45 | 0:03:47 | |
You coming out yet, little one? Eh? | 0:03:47 | 0:03:50 | |
Anxiously waiting in the incubation room | 0:03:52 | 0:03:55 | |
is an unusual father for a bird. | 0:03:55 | 0:03:57 | |
I saw you move then, I saw the egg move. | 0:04:01 | 0:04:03 | |
HE LAUGHS | 0:04:03 | 0:04:05 | |
You moved! | 0:04:05 | 0:04:06 | |
Lloyd Buck has been fascinated with owls since he was young. | 0:04:11 | 0:04:16 | |
Now he and his wife Rose have a whole family of birds, | 0:04:24 | 0:04:27 | |
including a barn owl called Kensa... | 0:04:27 | 0:04:30 | |
..Johanna the Tawny Owl... | 0:04:32 | 0:04:34 | |
Good girl. | 0:04:34 | 0:04:36 | |
..Arnie, | 0:04:36 | 0:04:37 | |
Bran, | 0:04:37 | 0:04:39 | |
Moses, | 0:04:39 | 0:04:41 | |
PJ... | 0:04:41 | 0:04:43 | |
and Sasha the tawny eagle. | 0:04:43 | 0:04:45 | |
Lloyd and Rose love and care for their birds | 0:04:48 | 0:04:50 | |
like their own children. | 0:04:50 | 0:04:52 | |
Good boys, come on then. | 0:04:52 | 0:04:53 | |
Whoo! | 0:04:53 | 0:04:54 | |
They also train them to star in films. | 0:04:54 | 0:04:56 | |
We've got a little pellet. | 0:05:07 | 0:05:09 | |
They have a passion for educating others about birds | 0:05:09 | 0:05:12 | |
and the importance of protecting them in the wild. | 0:05:12 | 0:05:15 | |
Through the eyes of this special family, | 0:05:29 | 0:05:32 | |
we're going to learn more about the owl's mysterious world. | 0:05:32 | 0:05:35 | |
Lloyd and Rose are going to put their own birds to the test... | 0:05:38 | 0:05:41 | |
..and, this year, they're expecting some new arrivals... | 0:05:44 | 0:05:47 | |
..two barn owl chicks. | 0:05:50 | 0:05:51 | |
-Hiya. How's it going, Lloyd? -Well, it's all right. | 0:05:54 | 0:05:58 | |
The eggs are being incubated by experts | 0:05:58 | 0:06:00 | |
at the Hawk Conservancy Trust, a specialist bird conservation centre. | 0:06:00 | 0:06:05 | |
He's already started to pip. There's a little bit of movement. | 0:06:05 | 0:06:09 | |
Can you see the movement? | 0:06:09 | 0:06:10 | |
Look at that! | 0:06:11 | 0:06:13 | |
Mike Riley and his team make regular checks on their progress. | 0:06:13 | 0:06:17 | |
-We'll put her back in now. -Yeah, yeah. | 0:06:17 | 0:06:20 | |
The first is nearly ready to hatch. | 0:06:20 | 0:06:22 | |
It's almost two days since the owlet inside | 0:06:31 | 0:06:33 | |
made her first pip on the shell. | 0:06:33 | 0:06:35 | |
Come on, little one. | 0:06:36 | 0:06:38 | |
Now she's exhausted... | 0:06:38 | 0:06:40 | |
Go on. What you doing? | 0:06:42 | 0:06:44 | |
Get out. | 0:06:44 | 0:06:45 | |
..and running out of oxygen. | 0:06:45 | 0:06:46 | |
One more big push and you're out! | 0:06:48 | 0:06:51 | |
Ooh, there you are! | 0:06:55 | 0:06:57 | |
Hello. | 0:06:59 | 0:07:00 | |
You've done well, little one, eh? | 0:07:02 | 0:07:04 | |
That must have been a huge effort, wasn't it? To get out of there. | 0:07:05 | 0:07:09 | |
See, it's easy to take it for granted when you're here. | 0:07:11 | 0:07:13 | |
But, actually, it's a really wondrous thing to see new life | 0:07:13 | 0:07:17 | |
to come into the world, there's something really special | 0:07:17 | 0:07:20 | |
about that. Really special. | 0:07:20 | 0:07:22 | |
Mind you, saying that, they're not the prettiest of owlets, are they? | 0:07:25 | 0:07:30 | |
This chick and her younger sibling | 0:07:32 | 0:07:35 | |
have come from a pair of captive barn owls. | 0:07:35 | 0:07:38 | |
OWLET SQUEAK | 0:07:38 | 0:07:40 | |
As they grow, they'll give us a rare and incredible opportunity | 0:07:40 | 0:07:44 | |
to learn more about these secretive birds. | 0:07:44 | 0:07:47 | |
We've already thought of a name, which is Luna. | 0:07:49 | 0:07:52 | |
We always tend to give our birds names | 0:07:53 | 0:07:56 | |
because they become part of the family. | 0:07:56 | 0:07:58 | |
With Lloyd's love and care, Luna grows quickly. | 0:08:08 | 0:08:12 | |
And, just six days later, she meets her younger sister. | 0:08:15 | 0:08:19 | |
Lloyd and Rose call her Lily. | 0:08:23 | 0:08:25 | |
Once the owlets are strong enough, it's time to bring them home. | 0:08:33 | 0:08:37 | |
-Hello! -Hello! | 0:08:39 | 0:08:41 | |
SHE LAUGHS | 0:08:41 | 0:08:43 | |
All right? There you are. | 0:08:43 | 0:08:46 | |
SHE LAUGHS | 0:08:46 | 0:08:48 | |
They're so cute. | 0:08:49 | 0:08:53 | |
Come on, then. | 0:08:58 | 0:08:59 | |
During these early days and weeks, Lloyd and Rose need to give | 0:08:59 | 0:09:03 | |
Luna and Lily round the clock attention. | 0:09:03 | 0:09:06 | |
Go on. Delicious! | 0:09:06 | 0:09:09 | |
'When they hatch, they're blind, completely helpless' | 0:09:09 | 0:09:13 | |
they can't even regulate their own body temperature, | 0:09:13 | 0:09:16 | |
and they need four feeds a day. | 0:09:16 | 0:09:17 | |
'It's just like babies, really. | 0:09:18 | 0:09:21 | |
'But you've taken on the responsibility' | 0:09:21 | 0:09:23 | |
so you just have to get on with it. | 0:09:23 | 0:09:25 | |
The Owlets have a long way to go before they transform | 0:09:30 | 0:09:33 | |
into magnificent super-powered owls. | 0:09:33 | 0:09:35 | |
Now, shall we write down what you did today, eh? | 0:09:37 | 0:09:41 | |
Nature will play its part, | 0:09:41 | 0:09:43 | |
but, right now, they're entirely dependent on Lloyd and Rose. | 0:09:43 | 0:09:48 | |
By the evening, everyone's exhausted. | 0:09:56 | 0:09:58 | |
But in the wild, this is the time when most owls are waking up. | 0:10:02 | 0:10:06 | |
OWL HOOTS | 0:10:06 | 0:10:09 | |
The tawny owl haunts our nights. | 0:10:13 | 0:10:15 | |
But why choose to live in this dark and difficult time of day? | 0:10:19 | 0:10:22 | |
OWL CALLS | 0:10:23 | 0:10:25 | |
With the help of a special heat-seeking camera, | 0:10:28 | 0:10:31 | |
we can enter this hidden, nocturnal world. | 0:10:31 | 0:10:33 | |
It's springtime in the Highlands of Scotland. | 0:10:37 | 0:10:40 | |
At this time of year, male owls are feeling the pressure. | 0:10:42 | 0:10:46 | |
This one has a family of hungry mouths to feed in a nearby nest box. | 0:10:49 | 0:10:53 | |
The thermal camera reveals something else. | 0:10:56 | 0:10:58 | |
Many mammals are active at night. | 0:11:02 | 0:11:04 | |
So, despite the dark, | 0:11:13 | 0:11:15 | |
it's an ideal time to go hunting. | 0:11:15 | 0:11:17 | |
Success. | 0:11:25 | 0:11:26 | |
The female comes straight over to collect the catch. | 0:11:33 | 0:11:35 | |
Her owlets are a month old, | 0:11:42 | 0:11:43 | |
with a growing appetite. | 0:11:43 | 0:11:45 | |
One mouse won't be enough. | 0:11:48 | 0:11:49 | |
But luckily there's plenty more where that came from. | 0:11:53 | 0:11:56 | |
No other bird of prey can hunt in such darkness. | 0:12:01 | 0:12:04 | |
So, at night, | 0:12:06 | 0:12:08 | |
owls have the skies to themselves. | 0:12:08 | 0:12:11 | |
It's one of the keys to their success. | 0:12:13 | 0:12:15 | |
But how are they able to see in the dark? | 0:12:19 | 0:12:21 | |
This is where owls deploy the first of their superpowers. | 0:12:27 | 0:12:32 | |
Owls have characteristically big eyes. | 0:12:34 | 0:12:37 | |
A tawny owl's eyes take up a staggering 70% of its skull. | 0:12:40 | 0:12:44 | |
For us, it's only 5%. | 0:12:51 | 0:12:53 | |
These large eyes enable the owl | 0:12:58 | 0:13:00 | |
to gather as much of the available light as possible. | 0:13:00 | 0:13:03 | |
At the back of the eye, | 0:13:06 | 0:13:07 | |
the retina has a particularly high density of rod cells. | 0:13:07 | 0:13:12 | |
These cells are extremely sensitive in low light, | 0:13:14 | 0:13:16 | |
capable of resolving | 0:13:16 | 0:13:18 | |
an extra layer of detail, | 0:13:18 | 0:13:20 | |
which is sent to the brain | 0:13:20 | 0:13:22 | |
via the optic nerve. | 0:13:22 | 0:13:23 | |
These special adaptations mean a tawny owl can see an image | 0:13:28 | 0:13:32 | |
two and a half times brighter than the one we see... | 0:13:32 | 0:13:35 | |
..which helps it target small mammals lurking in dark undergrowth. | 0:13:41 | 0:13:45 | |
But tawny owls have another incredible skill. | 0:13:51 | 0:13:54 | |
They're territorial birds, | 0:13:58 | 0:14:00 | |
and, as they fly around their home range, | 0:14:00 | 0:14:03 | |
they create a mental map. | 0:14:03 | 0:14:05 | |
This means they can find their way in the dark, | 0:14:09 | 0:14:12 | |
avoiding unseen obstacles. | 0:14:12 | 0:14:13 | |
So, it's the owl's formidable memory, | 0:14:18 | 0:14:21 | |
combined with their sensitive vision, | 0:14:21 | 0:14:23 | |
that helps them take advantage of the night-time world. | 0:14:23 | 0:14:26 | |
At two weeks old, | 0:14:37 | 0:14:39 | |
Luna and Lily open their eyes... | 0:14:39 | 0:14:41 | |
..but it's another few days before they can focus on anything. | 0:14:46 | 0:14:49 | |
-OWLET PEEPS -Yes! | 0:14:53 | 0:14:55 | |
Now at three and four weeks old, | 0:14:55 | 0:14:58 | |
they're starting to take in their surroundings. | 0:14:58 | 0:15:00 | |
THEY CHUCKLE | 0:15:01 | 0:15:03 | |
-Oi, oi! -Oi, oi! | 0:15:04 | 0:15:06 | |
ROSE LAUGHS | 0:15:06 | 0:15:08 | |
To encourage their development, | 0:15:08 | 0:15:11 | |
Lloyd and Rose take the owlets to meet the children at a local school. | 0:15:11 | 0:15:15 | |
-Hello, everybody. CHILDREN: -Hello. | 0:15:15 | 0:15:17 | |
Hello. | 0:15:17 | 0:15:18 | |
OK? | 0:15:19 | 0:15:21 | |
Well, this one here is Luna. | 0:15:21 | 0:15:23 | |
Luna? | 0:15:23 | 0:15:24 | |
Yes, and that's Lily. | 0:15:24 | 0:15:26 | |
-I've got a pet rabbit called Lily. -Have you? -Have you? Ah! -Oh! | 0:15:26 | 0:15:30 | |
Her nice wing feathers are starting to grow now, you can see. | 0:15:30 | 0:15:33 | |
Yeah. I think they can fly but they can't. | 0:15:33 | 0:15:36 | |
No. You know why? Because they're still too small. | 0:15:36 | 0:15:39 | |
It's a unique opportunity for the children | 0:15:39 | 0:15:41 | |
to learn more about owls... | 0:15:41 | 0:15:43 | |
That is the egg that Lily hatched from. | 0:15:43 | 0:15:46 | |
..and it's also clear how far the owlets have come. | 0:15:46 | 0:15:50 | |
So, when she hatched, only three weeks ago, 20 days ago, | 0:15:50 | 0:15:54 | |
she fitted in there. Look. | 0:15:54 | 0:15:56 | |
She was smaller than her own head is now. | 0:15:57 | 0:15:59 | |
-Whoa, whoa, whoa. -Isn't that amazing? | 0:15:59 | 0:16:02 | |
Now, who knows what's really clever about what owls can do? | 0:16:02 | 0:16:06 | |
-They can see in the dark. -That's it! Well done. | 0:16:06 | 0:16:09 | |
Now to be able to see at night, it's not easy, | 0:16:09 | 0:16:11 | |
but owls have very, very good eyes. | 0:16:11 | 0:16:13 | |
They're very clever birds. | 0:16:13 | 0:16:14 | |
Good night vision is probably the owl's best-known superpower. | 0:16:14 | 0:16:17 | |
There we are. What do you think? | 0:16:17 | 0:16:20 | |
-She's as soft as cotton wool. -She is! | 0:16:20 | 0:16:22 | |
But Luna was developing another one of her senses... | 0:16:22 | 0:16:26 | |
..even before she hatched. | 0:16:27 | 0:16:29 | |
-What do you think? -Shall we check on its progress? | 0:16:29 | 0:16:31 | |
Let's have a look. | 0:16:31 | 0:16:32 | |
On occasions, if you call to 'em, if you chip to 'em, | 0:16:34 | 0:16:37 | |
they actually call back to you. I'll shush to him. | 0:16:37 | 0:16:40 | |
Shusssh. | 0:16:40 | 0:16:42 | |
OWLET CHEEPS | 0:16:42 | 0:16:44 | |
I heard it! Amazing. | 0:16:44 | 0:16:46 | |
Remarkably, owlets recognise the calls of their parents | 0:16:46 | 0:16:49 | |
-even from inside the egg... -Shusssh. | 0:16:49 | 0:16:51 | |
-CHEEPING It's amazing! -Did you hear it? | 0:16:51 | 0:16:54 | |
Tiny little "Chip, chip." | 0:16:54 | 0:16:56 | |
We'll put him back in, then. | 0:16:56 | 0:16:57 | |
..which suggests sound must be an important part of their world. | 0:16:57 | 0:17:00 | |
But just how important is hearing to adult owls in the wild? | 0:17:04 | 0:17:09 | |
At a disused aerodrome in Essex, | 0:17:15 | 0:17:17 | |
this barn owl is on the lookout for her next meal. | 0:17:17 | 0:17:20 | |
Cold weather, and a blanket of snow, have left her short of food, | 0:17:29 | 0:17:34 | |
so she's been forced to hunt in the day. | 0:17:34 | 0:17:36 | |
And now she's got competition... | 0:17:41 | 0:17:43 | |
..a kestrel. | 0:17:45 | 0:17:46 | |
It's one of the downsides of hunting during the daylight hours. | 0:18:02 | 0:18:06 | |
And, even worse, the snow means she can't see her prey. | 0:18:12 | 0:18:16 | |
So how do you find your food | 0:18:19 | 0:18:21 | |
when it's hiding out of sight? | 0:18:21 | 0:18:22 | |
Hunger forces the kestrel to take a chance... | 0:18:33 | 0:18:36 | |
..but his razor sharp eyesight isn't enough in these conditions. | 0:18:40 | 0:18:44 | |
Luckily for the barn owl, she has another superpower in her armoury. | 0:18:46 | 0:18:51 | |
Flying blind won't stop her eating. | 0:19:07 | 0:19:10 | |
Because, although she can't see it, she can hear her prey, | 0:19:15 | 0:19:19 | |
even under the snow. | 0:19:19 | 0:19:21 | |
The kestrel simply doesn't have what it takes. | 0:19:23 | 0:19:25 | |
So how does an owl's extraordinary hearing work? | 0:19:33 | 0:19:36 | |
OWL HOOTS | 0:19:39 | 0:19:40 | |
Some owls have ear tufts... | 0:19:42 | 0:19:44 | |
..but these feathers aren't used for hearing. | 0:19:45 | 0:19:48 | |
They're more about communicating mood. | 0:19:50 | 0:19:52 | |
In fact, the owl's whole head is designed for listening. | 0:19:55 | 0:19:59 | |
Its distinctive round face is shaped like a satellite dish, | 0:20:01 | 0:20:05 | |
specifically to detect sound. | 0:20:05 | 0:20:07 | |
A ring of stiff feathers channel the sound towards the true ears, | 0:20:12 | 0:20:16 | |
which are hidden at the side of the face. | 0:20:16 | 0:20:20 | |
Some species of owl have one ear opening higher than the other. | 0:20:28 | 0:20:31 | |
This unique adaptation | 0:20:34 | 0:20:35 | |
allows the owl to work out what height a sound is coming from, | 0:20:35 | 0:20:39 | |
as well as the direction. | 0:20:39 | 0:20:40 | |
Sound arriving at the left ear | 0:20:43 | 0:20:44 | |
before it reaches the right, | 0:20:44 | 0:20:46 | |
tells the owl it's coming from below. | 0:20:46 | 0:20:48 | |
At certain frequencies, an owl's hearing | 0:20:56 | 0:20:59 | |
is ten times more sensitive than ours. | 0:20:59 | 0:21:02 | |
This extraordinary skill | 0:21:08 | 0:21:10 | |
means this great grey owl can locate its prey... | 0:21:10 | 0:21:13 | |
..even when it's out of sight. | 0:21:17 | 0:21:19 | |
Come on. | 0:21:37 | 0:21:39 | |
Shusssh. | 0:21:39 | 0:21:40 | |
Kensa. | 0:21:40 | 0:21:42 | |
Hearing is a key part of the owl's hunting strategy... | 0:21:42 | 0:21:45 | |
Kensa. | 0:21:45 | 0:21:46 | |
..in any environment. | 0:21:46 | 0:21:48 | |
Shusssh. Good girl. Come on. | 0:21:49 | 0:21:51 | |
Lloyd and Rose have an 11-year-old barn owl called Kensa... | 0:21:53 | 0:21:57 | |
Good girl. | 0:21:57 | 0:21:58 | |
..who they've trained to hunt to the sound of a beeper box. | 0:21:58 | 0:22:01 | |
BEEPING | 0:22:05 | 0:22:06 | |
When she hears that beep, | 0:22:06 | 0:22:08 | |
Kensa knows exactly where to find her food. | 0:22:08 | 0:22:10 | |
But what about at night? | 0:22:12 | 0:22:14 | |
Just how much is she relying on her hearing then? | 0:22:14 | 0:22:17 | |
So, that can go here. | 0:22:18 | 0:22:21 | |
To find out, | 0:22:21 | 0:22:23 | |
Lloyd's made an indoor hunting ground. | 0:22:23 | 0:22:25 | |
So, we're going to put the beeper in there. | 0:22:26 | 0:22:28 | |
Over to you, Rose. | 0:22:28 | 0:22:29 | |
He wants to be certain Kensa's not using her sight. | 0:22:29 | 0:22:32 | |
I want to make it totally dark. | 0:22:32 | 0:22:35 | |
So he creates an artificial night. | 0:22:35 | 0:22:37 | |
-OK, Rose? -Yep. | 0:22:41 | 0:22:43 | |
Right, here we go. | 0:22:43 | 0:22:45 | |
Torch off. | 0:22:45 | 0:22:46 | |
OK, ready? | 0:22:47 | 0:22:48 | |
With our infrared cameras, | 0:22:48 | 0:22:50 | |
we can see what's going on, | 0:22:50 | 0:22:53 | |
but Lloyd, Rose and, importantly, Kensa | 0:22:53 | 0:22:56 | |
are in total darkness. | 0:22:56 | 0:22:58 | |
KENSA HISSES Hold on, where is she? | 0:22:58 | 0:23:00 | |
She must be by me, by the sounds of it. | 0:23:00 | 0:23:03 | |
BEEPING | 0:23:03 | 0:23:05 | |
-Sounds like she's under my feet somewhere. -Shusssh. | 0:23:05 | 0:23:08 | |
KENSA CRIES | 0:23:08 | 0:23:10 | |
I can't hear, has she got it? | 0:23:10 | 0:23:12 | |
-I don't know. -Do you think she's got it? | 0:23:12 | 0:23:14 | |
Oh, my gosh, she's got it! | 0:23:14 | 0:23:15 | |
THEY LAUGH | 0:23:15 | 0:23:17 | |
Using only her hearing, | 0:23:17 | 0:23:19 | |
Kensa locks straight on to the beeper. | 0:23:19 | 0:23:21 | |
BEEPING | 0:23:21 | 0:23:22 | |
That sounds good! | 0:23:23 | 0:23:25 | |
I'll get me torch, hold on. Kensa. | 0:23:25 | 0:23:28 | |
Shusssh. Good girl, you clever owl. | 0:23:28 | 0:23:30 | |
Who needs eyes when you've got ears like that, eh? | 0:23:30 | 0:23:33 | |
But the owl's super-human hearing | 0:23:34 | 0:23:36 | |
is made even more effective by their party trick. | 0:23:36 | 0:23:40 | |
They can turn their head through an incredible 270 degrees. | 0:23:46 | 0:23:50 | |
If we did that, | 0:23:53 | 0:23:54 | |
we'd cut off the blood supply to our brains and pass out. | 0:23:54 | 0:23:58 | |
But owls have evolved special adaptations in their necks. | 0:24:00 | 0:24:03 | |
As their head turns, | 0:24:06 | 0:24:07 | |
wide spaces in the neck vertebrae | 0:24:07 | 0:24:09 | |
make sure the blood vessels don't get crushed... | 0:24:09 | 0:24:12 | |
..and enlarged arteries at the top of the neck create a reservoir, | 0:24:13 | 0:24:17 | |
which keeps a constant supply of blood to the brain. | 0:24:17 | 0:24:20 | |
This astonishing flexibility allows the owl | 0:24:25 | 0:24:28 | |
to focus its super-sensitive vision and hearing... | 0:24:28 | 0:24:31 | |
directly at its prey. | 0:24:31 | 0:24:33 | |
In just two months, | 0:25:01 | 0:25:02 | |
there's been an amazing transformation. | 0:25:02 | 0:25:05 | |
Luna and Lily have grown from helpless little chicks... | 0:25:08 | 0:25:11 | |
..to near-adult barn owls. | 0:25:15 | 0:25:17 | |
Now their fluffy down | 0:25:21 | 0:25:23 | |
is being pushed out | 0:25:23 | 0:25:24 | |
by proper flight feathers... | 0:25:24 | 0:25:26 | |
Ooh! Come on, then. | 0:25:28 | 0:25:29 | |
-Shusssh. -SHE CHUCKLES | 0:25:29 | 0:25:32 | |
..which marks the arrival of the biggest milestone | 0:25:32 | 0:25:34 | |
in their young lives. | 0:25:34 | 0:25:36 | |
Luna, come and get weighed. | 0:25:36 | 0:25:38 | |
Now Luna's started using her wings, | 0:25:38 | 0:25:40 | |
she's being slightly less cooperative | 0:25:40 | 0:25:42 | |
about her daily weigh-in. | 0:25:42 | 0:25:43 | |
Luna, I know you're hungry. | 0:25:43 | 0:25:46 | |
Come on, then. | 0:25:46 | 0:25:48 | |
Come on, then. | 0:25:48 | 0:25:49 | |
Good girl. Now, steady. | 0:25:49 | 0:25:51 | |
Don't go mad. | 0:25:51 | 0:25:54 | |
Steady, steady. | 0:25:54 | 0:25:56 | |
Good girl. That's it. | 0:25:56 | 0:25:59 | |
Wahey! | 0:25:59 | 0:26:01 | |
Luna, you can fly! | 0:26:01 | 0:26:04 | |
Luna's very first flight starts with a leap of faith from the scales... | 0:26:04 | 0:26:08 | |
..and now she's hop-flying every chance she can get... | 0:26:11 | 0:26:14 | |
..leaving her younger sister to stare in wonder. | 0:26:17 | 0:26:20 | |
ROSE LAUGHS | 0:26:25 | 0:26:27 | |
She's on the tripod! | 0:26:27 | 0:26:29 | |
Oh, yeah, she might. | 0:26:29 | 0:26:30 | |
Mastering this new skill doesn't happen over night. | 0:26:30 | 0:26:33 | |
She might have another go, though. | 0:26:33 | 0:26:35 | |
But it's something she must get right, | 0:26:42 | 0:26:44 | |
as flight is perhaps an owl's greatest superpower. | 0:26:44 | 0:26:48 | |
Luna. | 0:26:49 | 0:26:51 | |
Don't fall in the bucket of water! | 0:26:51 | 0:26:53 | |
Ooh, you're seeing what water is. | 0:26:55 | 0:26:57 | |
Is that interesting? | 0:26:57 | 0:26:59 | |
Shusssh. Oop! | 0:27:01 | 0:27:02 | |
THEY LAUGH | 0:27:05 | 0:27:06 | |
I told you not to go in the bucket of water. | 0:27:06 | 0:27:10 | |
Oh, poor thing! | 0:27:10 | 0:27:11 | |
You'll get very wet. | 0:27:11 | 0:27:13 | |
I don't think you'll do that again in a hurry. | 0:27:13 | 0:27:15 | |
Luna and Lily are still spending the night in the house. | 0:27:17 | 0:27:21 | |
Now Luna can fly, nowhere is out of bounds. | 0:27:26 | 0:27:29 | |
And her enthusiastic flight practice | 0:27:36 | 0:27:38 | |
is getting her into trouble. | 0:27:38 | 0:27:40 | |
Whoa! That's on the picture, Luna. | 0:27:42 | 0:27:44 | |
THEY LAUGH | 0:27:44 | 0:27:46 | |
That bird! | 0:27:46 | 0:27:48 | |
But Luna's lucky. | 0:27:48 | 0:27:49 | |
A house is a relatively safe place to practise this vital skill. | 0:27:49 | 0:27:53 | |
In the wild, some owls face a monumental challenge. | 0:28:00 | 0:28:03 | |
Californian redwoods are giants of the forest, | 0:28:07 | 0:28:11 | |
the tallest trees in the world. | 0:28:11 | 0:28:12 | |
And perched precariously at the top of this one | 0:28:14 | 0:28:18 | |
is a family of great grey owls. | 0:28:18 | 0:28:20 | |
It's a wonderfully safe place for a nest. | 0:28:30 | 0:28:32 | |
OWLET CRIES | 0:28:33 | 0:28:34 | |
But when it comes to learning to fly, | 0:28:34 | 0:28:37 | |
there are some obvious challenges. | 0:28:37 | 0:28:39 | |
Launching yourself off the equivalent of a 30-storey building | 0:28:48 | 0:28:52 | |
takes some courage. | 0:28:52 | 0:28:54 | |
Until they get the hang of it, | 0:29:05 | 0:29:06 | |
these owlets rely on being able to cling on. | 0:29:06 | 0:29:09 | |
This is less flying, | 0:29:19 | 0:29:20 | |
more falling with style. | 0:29:20 | 0:29:22 | |
He makes it safely to the ground. | 0:29:31 | 0:29:33 | |
But they must keep practising, | 0:29:44 | 0:29:46 | |
so now it's a long hard climb | 0:29:46 | 0:29:49 | |
back to the top. | 0:29:49 | 0:29:50 | |
And it's not long before they have lift off. | 0:29:58 | 0:30:02 | |
Although Lily's a week younger than Luna... | 0:30:12 | 0:30:15 | |
-SHE WHISTLES -Whoo! | 0:30:15 | 0:30:17 | |
..like any younger sibling, she's not going to be left behind. | 0:30:17 | 0:30:20 | |
You're a clever, clever, clever girl. | 0:30:20 | 0:30:23 | |
I know you're hungry. | 0:30:23 | 0:30:25 | |
Before long, she's progressed from flapping... | 0:30:25 | 0:30:28 | |
to flying. | 0:30:28 | 0:30:30 | |
ROSE LAUGHS | 0:30:31 | 0:30:33 | |
Ah, that is so clever! | 0:30:33 | 0:30:36 | |
The power of flight is something that sets birds apart. | 0:30:36 | 0:30:39 | |
SHE WHISTLES | 0:30:39 | 0:30:41 | |
Lily! | 0:30:41 | 0:30:43 | |
Whoo! | 0:30:43 | 0:30:44 | |
And owls have refined their technique | 0:30:44 | 0:30:47 | |
with some incredible adaptations. | 0:30:47 | 0:30:49 | |
Ready? | 0:30:53 | 0:30:54 | |
-You ready? -Yep. | 0:30:54 | 0:30:56 | |
Lily! | 0:30:56 | 0:30:58 | |
Come on. | 0:30:58 | 0:30:59 | |
To fully understand this superpower, we need to go back to basics. | 0:30:59 | 0:31:03 | |
Lily! | 0:31:03 | 0:31:04 | |
What does it take for Lily to get airborne? | 0:31:07 | 0:31:10 | |
To find out, Lloyd and Rose have enlisted the help | 0:31:12 | 0:31:16 | |
of bird expert Professor Graham Martin... | 0:31:16 | 0:31:19 | |
and high speed cameraman Mark Payne-Gill. | 0:31:19 | 0:31:22 | |
For a bird to take to the air, | 0:31:32 | 0:31:34 | |
it has to overcome two forces. | 0:31:34 | 0:31:37 | |
Gravity, | 0:31:39 | 0:31:40 | |
the invisible pull that keeps us grounded... | 0:31:40 | 0:31:43 | |
..and drag, | 0:31:44 | 0:31:45 | |
which is the resistance we experience | 0:31:45 | 0:31:47 | |
as we move through the air. | 0:31:47 | 0:31:49 | |
Birds use their wings to create lift... | 0:31:52 | 0:31:56 | |
and thrust. | 0:31:56 | 0:31:57 | |
But how do they do it? | 0:32:03 | 0:32:04 | |
Birds' wings are the shape of an aerofoil. | 0:32:08 | 0:32:11 | |
Air travelling over the top of the wing | 0:32:13 | 0:32:15 | |
has to travel faster than air travelling beneath. | 0:32:15 | 0:32:18 | |
This creates a difference in air pressure, | 0:32:20 | 0:32:23 | |
which generates lift. | 0:32:23 | 0:32:25 | |
To gain forward momentum, | 0:32:27 | 0:32:29 | |
birds flap their wings. | 0:32:29 | 0:32:31 | |
This makes the air flowing over them spiral off the trailing edge. | 0:32:32 | 0:32:35 | |
These vortices | 0:32:39 | 0:32:41 | |
thrust the bird forwards and upwards. | 0:32:41 | 0:32:44 | |
These are the basic principles of all flight. | 0:32:51 | 0:32:54 | |
But what's so unique about the way owls fly? | 0:32:56 | 0:32:59 | |
-We fly quite a few different types of bird... -Yeah. | 0:33:02 | 0:33:05 | |
-..of varying sizes. -Yeah. | 0:33:05 | 0:33:07 | |
But the one thing I notice about the owls | 0:33:07 | 0:33:09 | |
is they always appear to be a lot slower | 0:33:09 | 0:33:11 | |
when they're flying than the other birds. | 0:33:11 | 0:33:13 | |
Well, all birds have got different wing shapes | 0:33:13 | 0:33:15 | |
and they can fly at different speeds - | 0:33:15 | 0:33:17 | |
it's just like aircraft. | 0:33:17 | 0:33:19 | |
So if you look at the wing size of a barn owl, | 0:33:19 | 0:33:21 | |
it's actually got a very big wing, | 0:33:21 | 0:33:23 | |
and so they can fly very slow, very controlled. | 0:33:23 | 0:33:26 | |
To really understand the barn owl's slow flight, | 0:33:29 | 0:33:33 | |
Lloyd's putting Lily to the test against two of his other birds. | 0:33:33 | 0:33:36 | |
Maisie the greylag goose, | 0:33:43 | 0:33:45 | |
a long distance endurance flier... | 0:33:45 | 0:33:47 | |
..and Moses the peregrine falcon - | 0:33:50 | 0:33:52 | |
one of the fastest birds on earth. | 0:33:52 | 0:33:54 | |
The peregrine takes the lead. | 0:34:07 | 0:34:10 | |
Its long and pointed wings are quite flat, | 0:34:10 | 0:34:13 | |
designed for speed and manoeuvrability, | 0:34:13 | 0:34:15 | |
which it needs to hunt. | 0:34:15 | 0:34:17 | |
The goose is next. | 0:34:20 | 0:34:21 | |
Weighing three kilograms, | 0:34:23 | 0:34:25 | |
its relatively short and narrow wings work hard to get it airborne, | 0:34:25 | 0:34:29 | |
but once up, it can sustain this for hours. | 0:34:29 | 0:34:32 | |
The barn owl has the largest wings in relation to its body | 0:34:38 | 0:34:42 | |
and its aerofoil is very curved, | 0:34:42 | 0:34:45 | |
which generates a huge amount of lift. | 0:34:45 | 0:34:47 | |
So the barn owl can fly slower | 0:34:49 | 0:34:52 | |
and with fewer wingbeats than most other birds. | 0:34:52 | 0:34:55 | |
Whoo! Good girl. | 0:34:55 | 0:34:58 | |
But why is that important? | 0:35:00 | 0:35:02 | |
Sometimes when you're watching the owls fly, | 0:35:02 | 0:35:04 | |
they go so slowly | 0:35:04 | 0:35:05 | |
it looks as if they're not going to be able to maintain flight. | 0:35:05 | 0:35:08 | |
That's right. They are actually flying so slow | 0:35:08 | 0:35:11 | |
that they're very, very close to stalling. | 0:35:11 | 0:35:13 | |
But, of course, that's what they need to do | 0:35:13 | 0:35:16 | |
because when they're doing that very, very slow flight, | 0:35:16 | 0:35:18 | |
they're hunting. | 0:35:18 | 0:35:20 | |
It may be just a little rustle in the grass, | 0:35:20 | 0:35:23 | |
so they've got to be in a position to drop out the sky | 0:35:23 | 0:35:25 | |
and investigate it. | 0:35:25 | 0:35:26 | |
-And get a nice, tasty vole. -Absolutely, yeah. | 0:35:31 | 0:35:33 | |
Owls have evolved a wing design | 0:35:36 | 0:35:38 | |
perfectly suited for their aerial hunting strategy. | 0:35:38 | 0:35:41 | |
Slow, yet deadly. | 0:35:44 | 0:35:46 | |
But the refinements don't stop there. | 0:35:50 | 0:35:52 | |
These birds have fine-tuned their flight | 0:35:54 | 0:35:56 | |
so each species has subtle adaptations | 0:35:56 | 0:35:59 | |
for the environment it lives in. | 0:35:59 | 0:36:00 | |
Like the barn owl, | 0:36:05 | 0:36:07 | |
these short-eared owls have very large, broad wings, | 0:36:07 | 0:36:10 | |
ideal for flying slowly whilst hunting over open ground. | 0:36:10 | 0:36:14 | |
Owls that live in woodland, like tawny owls, | 0:36:18 | 0:36:21 | |
have shorter, more rounded wings | 0:36:21 | 0:36:23 | |
to help them manoeuvre between trees. | 0:36:23 | 0:36:26 | |
Wherever they live, | 0:36:31 | 0:36:32 | |
all owls have an amazing aerial agility. | 0:36:32 | 0:36:35 | |
They're even able to take off vertically from standing. | 0:36:38 | 0:36:40 | |
It's a great defensive move, | 0:36:46 | 0:36:47 | |
especially when you've got young to protect. | 0:36:47 | 0:36:50 | |
SHARP BIRDCALL | 0:36:50 | 0:36:51 | |
SHARP BIRDCALL | 0:36:52 | 0:36:54 | |
A dive-bombing arctic skua is no match for the snowy owl. | 0:37:01 | 0:37:06 | |
Such mastery of the skies seems to make these owls fearless... | 0:37:19 | 0:37:22 | |
..even against one of the Arctic's largest predators. | 0:37:25 | 0:37:28 | |
OWL SHRIEKS | 0:37:34 | 0:37:35 | |
OWL SHRIEKS | 0:37:48 | 0:37:49 | |
Her supreme flying skills drive the wolves away... | 0:38:02 | 0:38:05 | |
..and her family is safe. | 0:38:12 | 0:38:14 | |
Owls have one more amazing flying skill... | 0:38:24 | 0:38:26 | |
..and this one is totally unique. | 0:38:31 | 0:38:33 | |
Floating across the meadow, | 0:38:37 | 0:38:39 | |
the barn owl is ghost-like in appearance... | 0:38:39 | 0:38:42 | |
..and mysteriously quiet, too. | 0:38:44 | 0:38:46 | |
But just how quiet is a hunting barn owl? | 0:38:50 | 0:38:52 | |
Kensa. | 0:38:56 | 0:38:57 | |
Shusssh. | 0:38:57 | 0:38:58 | |
To find out, Lloyd's taken Kensa to a special studio... | 0:38:58 | 0:39:02 | |
..where Graham... | 0:39:05 | 0:39:06 | |
WINGBEATS | 0:39:06 | 0:39:07 | |
..and sound recordist Gary Moore are going to put her to the test. | 0:39:07 | 0:39:11 | |
..against Smudge the pigeon... | 0:39:15 | 0:39:18 | |
..and Moses the peregrine. | 0:39:20 | 0:39:22 | |
The birds' challenge - | 0:39:27 | 0:39:29 | |
to fly over a series of super-sensitive microphones. | 0:39:29 | 0:39:32 | |
ROSE WHISTLES | 0:39:32 | 0:39:34 | |
WINGBEATS | 0:39:34 | 0:39:35 | |
Good girl. | 0:39:35 | 0:39:37 | |
THEY MURMUR | 0:39:37 | 0:39:38 | |
Moses. | 0:39:38 | 0:39:40 | |
Mo. | 0:39:40 | 0:39:41 | |
WINGBEATS | 0:39:43 | 0:39:45 | |
And now it's Kensa's turn. | 0:39:48 | 0:39:50 | |
Shusssh. | 0:39:52 | 0:39:53 | |
Here we go! | 0:39:53 | 0:39:55 | |
Shusssh. KENSA SHRIEKS | 0:39:55 | 0:39:57 | |
KENSA SHRIEKS | 0:40:01 | 0:40:03 | |
-Did you hear anything? -Wow, that was really good. | 0:40:03 | 0:40:05 | |
No, nothing at all. Absolutely quiet. | 0:40:05 | 0:40:08 | |
It was amazing! | 0:40:08 | 0:40:09 | |
But what have the microphones picked up? | 0:40:11 | 0:40:13 | |
TUB RATTLES | 0:40:13 | 0:40:15 | |
The decibel waveforms show the sound being generated | 0:40:15 | 0:40:18 | |
by the birds in flight. | 0:40:18 | 0:40:21 | |
WINGBEATS | 0:40:21 | 0:40:22 | |
Each spike is an individual wingbeat. | 0:40:25 | 0:40:28 | |
THUD | 0:40:31 | 0:40:33 | |
WINGBEATS | 0:40:35 | 0:40:37 | |
THUD | 0:40:44 | 0:40:45 | |
But with the barn owl... | 0:40:52 | 0:40:53 | |
..there's almost nothing. | 0:40:56 | 0:40:57 | |
Even our array of super-sensitive microphones | 0:41:00 | 0:41:02 | |
fail to pick up any sound of Kensa in flight. | 0:41:02 | 0:41:05 | |
..and here's the owl doing exactly the same. | 0:41:05 | 0:41:07 | |
KENSA SHRIEKS | 0:41:07 | 0:41:10 | |
KENSA SHRIEKS | 0:41:14 | 0:41:15 | |
Nothing, nothing at all. | 0:41:16 | 0:41:19 | |
-I'll play it again. -KENSA SHRIEKS | 0:41:19 | 0:41:20 | |
KENSA SHRIEKS | 0:41:25 | 0:41:27 | |
-There's not a sound. -Yes. | 0:41:27 | 0:41:28 | |
That is really impressive, isn't it? | 0:41:28 | 0:41:31 | |
Yes, it shows that they really are silent fliers. | 0:41:31 | 0:41:33 | |
So how does a barn owl fly so silently? | 0:41:35 | 0:41:37 | |
WINGBEATS | 0:41:44 | 0:41:45 | |
When air moves, it generates sound. | 0:41:49 | 0:41:52 | |
The more movement, the greater the sound. | 0:41:58 | 0:42:01 | |
The pigeon's large body and small wings | 0:42:05 | 0:42:07 | |
mean it can't stay airborne without a lot of fast flapping. | 0:42:07 | 0:42:11 | |
This creates turbulence in the feathers below. | 0:42:15 | 0:42:18 | |
WINGBEATS | 0:42:18 | 0:42:20 | |
The peregrine has much larger wings, | 0:42:24 | 0:42:26 | |
which it uses to build up speed and chase down its prey. | 0:42:26 | 0:42:29 | |
The barn owl is far more graceful. | 0:42:54 | 0:42:56 | |
Kensa's large wings and small body | 0:43:08 | 0:43:11 | |
make it easier for her to generate lift. | 0:43:11 | 0:43:13 | |
So, just one gentle wingbeat | 0:43:18 | 0:43:21 | |
sees her gliding effortlessly through the air... | 0:43:21 | 0:43:23 | |
..creating little more than a whisper in the feathers below. | 0:43:26 | 0:43:29 | |
But that's not the only thing | 0:43:38 | 0:43:40 | |
that helps the barn owl achieve near-silent flight. | 0:43:40 | 0:43:43 | |
Its flight feathers have noise-reducing fringes | 0:43:51 | 0:43:54 | |
on the leading and trailing edges. | 0:43:54 | 0:43:56 | |
And they have a velvet-like top to them. | 0:44:03 | 0:44:05 | |
These soft surfaces absorb air movement, | 0:44:08 | 0:44:12 | |
reducing any turbulence and minimising sound. | 0:44:12 | 0:44:16 | |
Birds like pigeons and peregrines | 0:44:21 | 0:44:23 | |
don't have these specialised features. | 0:44:23 | 0:44:25 | |
So, why are they important for an owl? | 0:44:32 | 0:44:34 | |
I suppose being able to fly so silently | 0:44:36 | 0:44:40 | |
gives you two huge advantages over your prey. | 0:44:40 | 0:44:42 | |
Not only on a dark night, if you were a vole, | 0:44:42 | 0:44:45 | |
would you not hear your killer coming - you wouldn't hear it! | 0:44:45 | 0:44:49 | |
Also, it allows the owl, I suppose, to pinpoint its prey | 0:44:49 | 0:44:53 | |
without any interference from the noise of their wings. | 0:44:53 | 0:44:56 | |
It doesn't want to hear itself | 0:44:56 | 0:44:57 | |
as it's trying to home in on a very, very small sound. | 0:44:57 | 0:45:00 | |
-That's incredible, isn't it? -Absolutely. | 0:45:00 | 0:45:02 | |
Silent flight is possibly the greatest | 0:45:04 | 0:45:07 | |
of all the owl's superpowers | 0:45:07 | 0:45:09 | |
and it makes a huge difference to their hunting success. | 0:45:09 | 0:45:13 | |
But, like every superpowered creature, | 0:45:15 | 0:45:18 | |
owls have their kryptonite. | 0:45:18 | 0:45:21 | |
THUNDER RUMBLES | 0:45:21 | 0:45:22 | |
Rain. | 0:45:27 | 0:45:28 | |
OWL CALLS | 0:45:38 | 0:45:39 | |
This male, short-eared owl has a young family back at the nest. | 0:45:41 | 0:45:45 | |
When it rains, they're all at risk. | 0:45:46 | 0:45:49 | |
Because there's a price to pay for having silent feathers - | 0:45:55 | 0:45:58 | |
they can't also be waterproof. | 0:45:58 | 0:46:01 | |
The female hunkers down. | 0:46:08 | 0:46:10 | |
She can't move, or her chicks will be at risk of hypothermia. | 0:46:12 | 0:46:15 | |
The male is struggling, too. | 0:46:20 | 0:46:22 | |
He can't hear his prey over the driving rain. | 0:46:24 | 0:46:27 | |
So, today, his family will go hungry. | 0:46:32 | 0:46:35 | |
Wet weather can be fatal for owls. | 0:46:42 | 0:46:44 | |
It's one of the reasons some don't make it through their first winter. | 0:46:50 | 0:46:54 | |
Learning to hunt for themselves | 0:47:10 | 0:47:12 | |
is a challenge all young owls face | 0:47:12 | 0:47:14 | |
if they're going to survive. | 0:47:14 | 0:47:16 | |
Little owls fledge between four and five weeks. | 0:47:23 | 0:47:26 | |
After this, their parents encourage them to fend for themselves. | 0:47:28 | 0:47:32 | |
The adults usually hunt voles and other small mammals... | 0:47:37 | 0:47:40 | |
..but these pint-sized youngsters don't have the experience | 0:47:43 | 0:47:47 | |
to take on such tricky prey. | 0:47:47 | 0:47:49 | |
So, they start by practising on something a bit easier. | 0:47:58 | 0:48:01 | |
Earthworms won't be enough to see them through the winter... | 0:48:14 | 0:48:17 | |
..but they're great for honing their hunting technique. | 0:48:20 | 0:48:23 | |
As birds of prey, | 0:48:32 | 0:48:34 | |
owls are defined by their habit for hunting small animals. | 0:48:34 | 0:48:37 | |
Mastering the kill is a critical survival skill... | 0:48:39 | 0:48:42 | |
..but it's clearly not easy. | 0:48:47 | 0:48:48 | |
So what exactly is it youngsters need to learn? | 0:48:49 | 0:48:52 | |
To find out, Lloyd's brought Kensa | 0:48:54 | 0:48:57 | |
to meet animal locomotion scientist Dr Jim Usherwood. | 0:48:57 | 0:49:00 | |
Together they'll try to deconstruct the moment she pounces on her prey. | 0:49:02 | 0:49:06 | |
In Jim's laboratory, | 0:49:08 | 0:49:10 | |
they've created a mini hunting ground. | 0:49:10 | 0:49:12 | |
That can go there. | 0:49:12 | 0:49:14 | |
Got the beeper? | 0:49:14 | 0:49:15 | |
They've hidden a beeper box and some food in the long grass. | 0:49:15 | 0:49:18 | |
Right... | 0:49:18 | 0:49:20 | |
And, concealed beneath the turf, | 0:49:20 | 0:49:22 | |
is a special device that can measure the forces at work. | 0:49:22 | 0:49:25 | |
BEEPING | 0:49:26 | 0:49:28 | |
-She's got it. -There's a good girl. | 0:49:35 | 0:49:38 | |
You clever old barn owl. | 0:49:41 | 0:49:43 | |
How much force, then, does she exert on the pounce? | 0:49:43 | 0:49:48 | |
So, here we have the vertical forces of the owl. | 0:49:48 | 0:49:51 | |
And, so, there's the force of taking off, | 0:49:51 | 0:49:53 | |
and then you see some fairly powerful flaps, | 0:49:53 | 0:49:56 | |
and then she eases off the gas, | 0:49:56 | 0:49:59 | |
uses gravity to come back down at speed, | 0:49:59 | 0:50:01 | |
hits the ground at about five metres a second, | 0:50:01 | 0:50:04 | |
-with a force that's something like 12 times body weight. -Wow. | 0:50:04 | 0:50:07 | |
This is the moment an owl must bring all its superpowers together. | 0:50:12 | 0:50:17 | |
Hanging silently in the air, | 0:50:24 | 0:50:27 | |
Kensa uses her hearing and eyesight to find her target. | 0:50:27 | 0:50:30 | |
She angles her face to pinpoint the sound. | 0:50:39 | 0:50:41 | |
Once she's locked on, | 0:50:47 | 0:50:49 | |
she positions her entire body for the pounce. | 0:50:49 | 0:50:53 | |
And then, what I find really interesting, | 0:51:05 | 0:51:07 | |
look, when she comes down, | 0:51:07 | 0:51:09 | |
basically she's going headfirst towards the ground. | 0:51:09 | 0:51:12 | |
And it's only now the legs come forwards. | 0:51:12 | 0:51:15 | |
But the legs are still very, very bent, | 0:51:15 | 0:51:17 | |
and, then, it's right at the very end the legs extend | 0:51:17 | 0:51:20 | |
and then you get that thump. | 0:51:20 | 0:51:22 | |
So, she's coming down at five metres a second. | 0:51:22 | 0:51:24 | |
She's hitting the ground at around 12 times her body weight. | 0:51:24 | 0:51:29 | |
-Mm-hm. -Which would make sense, | 0:51:29 | 0:51:30 | |
because primarily she's hunting small mammals. | 0:51:30 | 0:51:34 | |
So she wants to hit them with as much force as possible, | 0:51:34 | 0:51:36 | |
to disable it and kill it. | 0:51:36 | 0:51:38 | |
What I was thinking was those long legs would be useful | 0:51:38 | 0:51:41 | |
to ease off the force - | 0:51:41 | 0:51:43 | |
but she's not easing off at all. | 0:51:43 | 0:51:44 | |
She's actually extending with her legs just as she hits the ground, | 0:51:44 | 0:51:48 | |
then gives it a good old thump. | 0:51:48 | 0:51:49 | |
To put this in perspective, the force of Kensa's pounce | 0:51:53 | 0:51:57 | |
is the equivalent of a 12-tonne truck hitting an 80kg man. | 0:51:57 | 0:52:01 | |
It's unlikely her prey | 0:52:04 | 0:52:06 | |
would survive the impact. | 0:52:06 | 0:52:07 | |
You wouldn't want to be a vole, would you, now? | 0:52:08 | 0:52:11 | |
No, no. No, life as a vole would be brief. | 0:52:11 | 0:52:13 | |
LLOYD LAUGHS | 0:52:13 | 0:52:14 | |
The journey to mastering such finely-tuned superpowers | 0:52:28 | 0:52:31 | |
starts early. | 0:52:31 | 0:52:33 | |
It's now three months since Luna and Lily entered the world. | 0:52:39 | 0:52:43 | |
They started to use their senses even before they hatched. | 0:52:50 | 0:52:53 | |
Shusssh. | 0:52:56 | 0:52:57 | |
OWLET CHEEPS | 0:52:57 | 0:52:59 | |
I heard it! Amazing. | 0:52:59 | 0:53:02 | |
First, their hearing. | 0:53:02 | 0:53:04 | |
And then, within three weeks, | 0:53:07 | 0:53:10 | |
they were using their eyesight to explore their surroundings. | 0:53:10 | 0:53:13 | |
Their development was encouraged by Lloyd and Rose | 0:53:18 | 0:53:21 | |
every step of the way. | 0:53:21 | 0:53:23 | |
Who knows what's really clever about what owls can do? | 0:53:23 | 0:53:25 | |
-They can see in the dark. -That's it! Well done. | 0:53:25 | 0:53:28 | |
At just two months old, | 0:53:30 | 0:53:31 | |
Luna and Lily started to fly. | 0:53:31 | 0:53:33 | |
Wow! | 0:53:35 | 0:53:37 | |
Whoa, that's on the picture, Luna. | 0:53:38 | 0:53:41 | |
Now, at three months old, | 0:53:51 | 0:53:53 | |
it's time to see if they can put it all together. | 0:53:53 | 0:53:56 | |
Shusssh. | 0:53:59 | 0:54:00 | |
Come on, Luna. | 0:54:00 | 0:54:02 | |
Luna. | 0:54:02 | 0:54:03 | |
ROSE LAUGHS | 0:54:03 | 0:54:04 | |
Hello. | 0:54:04 | 0:54:05 | |
Mind your feet! Lily, come here. | 0:54:05 | 0:54:09 | |
Luna! | 0:54:09 | 0:54:10 | |
Luna and Lily have grown up | 0:54:10 | 0:54:12 | |
in an extraordinary family... | 0:54:12 | 0:54:14 | |
Good girl. | 0:54:14 | 0:54:16 | |
..and become bold and confident birds. | 0:54:16 | 0:54:19 | |
Lily! Yep. | 0:54:19 | 0:54:20 | |
ROSE LAUGHS | 0:54:22 | 0:54:24 | |
Luna, you're not meant to be on the camera. | 0:54:24 | 0:54:27 | |
Lily! | 0:54:27 | 0:54:29 | |
-Good girl. -Good girl, good girl! | 0:54:29 | 0:54:32 | |
But despite their unusual upbringing, | 0:54:32 | 0:54:35 | |
out in the meadow, their natural instincts kick in. | 0:54:35 | 0:54:39 | |
They're hunting, just like adult barn owls, | 0:54:43 | 0:54:46 | |
using all their superpowers of keen eyesight, | 0:54:46 | 0:54:50 | |
extraordinary hearing | 0:54:50 | 0:54:52 | |
and slow and silent flight. | 0:54:52 | 0:54:54 | |
Shusssh. | 0:54:57 | 0:54:58 | |
Good girl, come on. | 0:54:58 | 0:54:59 | |
Nature has played its part... | 0:55:01 | 0:55:03 | |
BEEPING | 0:55:03 | 0:55:04 | |
Ooh, good girl. Got it? | 0:55:04 | 0:55:06 | |
..and Lloyd and Rose have done everything they can | 0:55:06 | 0:55:09 | |
to get both birds to this moment. | 0:55:09 | 0:55:10 | |
Got it stuck? | 0:55:10 | 0:55:11 | |
There you go. | 0:55:13 | 0:55:15 | |
But, while Lily continues to hone her skills living alongside them... | 0:55:15 | 0:55:19 | |
..there's been an unexpected twist to her sister's story. | 0:55:20 | 0:55:23 | |
One evening, | 0:55:31 | 0:55:32 | |
Luna flew off... | 0:55:32 | 0:55:34 | |
and she didn't come back. | 0:55:34 | 0:55:36 | |
For Lloyd, it only underlines her graduation | 0:55:40 | 0:55:43 | |
from owlet to adult, | 0:55:43 | 0:55:46 | |
reassuring him that he's equipped her with everything she needs | 0:55:46 | 0:55:49 | |
for an independent life. | 0:55:49 | 0:55:51 | |
I've given her all the skills that she needs to survive. | 0:55:52 | 0:55:55 | |
I've been her parent. She's chosen to go - | 0:55:55 | 0:55:58 | |
it's her choice - | 0:55:58 | 0:56:00 | |
and we always say they've got that choice to stay or go. | 0:56:00 | 0:56:04 | |
It's sad for me because you get really attached to them, | 0:56:04 | 0:56:08 | |
but they don't have those trappings of human sentiments. | 0:56:08 | 0:56:11 | |
She's just gone on to the wild to do her own thing. | 0:56:11 | 0:56:14 | |
Now, more than ever, Luna will rely on those special skills | 0:56:22 | 0:56:26 | |
that set owls apart. | 0:56:26 | 0:56:28 | |
For centuries, these enchanting birds have captured our imagination. | 0:57:02 | 0:57:07 | |
With their haunting calls and ghostly appearances, | 0:57:14 | 0:57:18 | |
owls add a magic and mystery to our landscapes. | 0:57:18 | 0:57:22 | |
Their charismatic faces are so familiar, | 0:57:35 | 0:57:38 | |
perhaps because they look that bit more human | 0:57:38 | 0:57:40 | |
than other birds. | 0:57:40 | 0:57:42 | |
But it's their superpowers | 0:57:55 | 0:57:57 | |
that make them one of the most successful | 0:57:57 | 0:57:59 | |
and best-loved birds on our planet. | 0:57:59 | 0:58:01 |