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Hello and welcome to Hands on Nature. | 0:00:02 | 0:00:04 | |
I'm Chris Packham and this is your user's guide | 0:00:04 | 0:00:06 | |
to the very best of the UK's wildlife. | 0:00:06 | 0:00:09 | |
Who needs far-flung exotic places? Just look at this! | 0:00:09 | 0:00:13 | |
But today you will need a stout pair of boots and a waterproof coat, | 0:00:13 | 0:00:17 | |
because we're going to be taking a closer look at our uplands. | 0:00:17 | 0:00:20 | |
Meet the mountain specialist | 0:00:20 | 0:00:22 | |
trying to give me the slip in its highland home. | 0:00:22 | 0:00:26 | |
Mike Dilger grapples with the American invader, | 0:00:26 | 0:00:29 | |
that's over-sized and over here. | 0:00:29 | 0:00:31 | |
If that was in the water, it'd actually be lying up like this | 0:00:31 | 0:00:34 | |
with its claws in the air, basically saying, "get off!" | 0:00:34 | 0:00:37 | |
And there's a surprise for Janet Sumner in a southern upland. | 0:00:37 | 0:00:41 | |
Such a special moment, I'd no idea they lived up trees! | 0:00:41 | 0:00:45 | |
This amazing landscape is the Cairngorm National Park | 0:00:55 | 0:00:59 | |
and it includes some of the highest mountains in the UK. | 0:00:59 | 0:01:02 | |
And just look at it, it's pretty impressive. | 0:01:02 | 0:01:04 | |
But this habitat is a harsh and a hostile one and to survive here | 0:01:04 | 0:01:09 | |
you've got to be really tough. | 0:01:09 | 0:01:11 | |
After all, the conditions could be described as Arctic. | 0:01:11 | 0:01:14 | |
Now, if you know what to look for in this big country, you can enjoy | 0:01:14 | 0:01:18 | |
a pretty amazing highland wildlife experience. | 0:01:18 | 0:01:21 | |
So many mountains, so little time - so pick one where things are made | 0:01:26 | 0:01:29 | |
a bit easier for you. | 0:01:29 | 0:01:31 | |
And Cairn Gorm is probably the best. | 0:01:33 | 0:01:36 | |
Not least because a road comes half way up and there's a railway | 0:01:36 | 0:01:39 | |
which takes you almost to the top, but if you want to get the best | 0:01:39 | 0:01:42 | |
out of the wildlife here, and there are some super species, | 0:01:42 | 0:01:45 | |
I'm afraid you've got to do things the old-fashioned, hard way. | 0:01:45 | 0:01:50 | |
The Cairngorms are Britain's premier mountain range, in scale, | 0:01:50 | 0:01:54 | |
altitude and sheer wilderness. | 0:01:54 | 0:01:55 | |
Mostly around 4,000 feet high, it's a harsh and unforgiving landscape. | 0:01:55 | 0:02:01 | |
But look closely and there is life here. | 0:02:04 | 0:02:06 | |
If you know where to look there are plants and animals aplenty. | 0:02:06 | 0:02:09 | |
And in the hunt for three of them - two specialist highland birds, | 0:02:09 | 0:02:13 | |
the ptarmigan and snow bunting, together with the mountain hare, | 0:02:13 | 0:02:17 | |
and giving me a hand is Cairngorm ranger, Nick Bullivant. | 0:02:17 | 0:02:21 | |
And within minutes we're in luck. | 0:02:23 | 0:02:26 | |
Amongst the boulders we spot a mountain hare. | 0:02:26 | 0:02:28 | |
The wind ruffling his fur. | 0:02:31 | 0:02:33 | |
They keep those black ear tips all year, but all the rest... | 0:02:36 | 0:02:40 | |
It goes white in winter. | 0:02:40 | 0:02:43 | |
I've never seen them white. They go completely white? | 0:02:43 | 0:02:45 | |
-Yeah. -Just the ear tips? | 0:02:45 | 0:02:47 | |
Keeps them out of harm's way because | 0:02:47 | 0:02:51 | |
-hares and ptarmigan try to keep out of the way of golden eagles. -Yeah. | 0:02:51 | 0:02:56 | |
-They're everywhere. -They are everywhere. | 0:02:57 | 0:03:00 | |
They're not what we need in terms of a montane specialist, are they? | 0:03:00 | 0:03:05 | |
Where's our snow bunting and ptarmigan? | 0:03:05 | 0:03:07 | |
Hare combo with large fries and a Diet Coke. | 0:03:07 | 0:03:10 | |
Small plastic toy to take away. | 0:03:12 | 0:03:14 | |
So back to our hunt, and at least there's a trail to follow. | 0:03:17 | 0:03:21 | |
Now, you're gonna love this, I promise you | 0:03:21 | 0:03:24 | |
you're going to love it and if you don't, I guarantee your kids will. | 0:03:24 | 0:03:27 | |
Because now we're gonna take a look at poo. | 0:03:27 | 0:03:30 | |
Because poo is important, poo can tell you exactly what's | 0:03:30 | 0:03:33 | |
living wherever you found it. And this is a collection I've made today. | 0:03:33 | 0:03:37 | |
This lovely little round pellet here, | 0:03:37 | 0:03:40 | |
is mountain hare poo. | 0:03:40 | 0:03:42 | |
Just like a rabbit, slightly flatter, dropped singly, | 0:03:42 | 0:03:45 | |
and it's this colour when it's dry, and it's this colour when it's wet. | 0:03:45 | 0:03:50 | |
This one here is quite small for the animal, normally it's much larger. | 0:03:50 | 0:03:55 | |
It's dark, often black, it's full of hair. | 0:03:55 | 0:03:58 | |
The blackness tells you it's a carnivore, | 0:03:58 | 0:04:00 | |
so does the fact that it's full of hair, and this is fox poo, | 0:04:00 | 0:04:03 | |
and it has a characteristic scent. | 0:04:03 | 0:04:05 | |
But I think this one's been a bit washed out, so it's lacking that. | 0:04:05 | 0:04:08 | |
This, though, is one of my favourites. | 0:04:08 | 0:04:10 | |
These lovely little pellets here are ptarmigan poo. | 0:04:10 | 0:04:14 | |
And if you look into them, you can see all the plant material | 0:04:14 | 0:04:17 | |
the bird's been eating. | 0:04:17 | 0:04:19 | |
They're together because they sit down in one spot and just poo there. | 0:04:19 | 0:04:24 | |
There are lovely plants - it's a garden centre at 3,000 feet. | 0:04:24 | 0:04:29 | |
Nick, I keep spotting lots of this little pink flower here. | 0:04:31 | 0:04:35 | |
-D'you know what it is? -Yes, it's trailing azalea. | 0:04:35 | 0:04:39 | |
-Azalea? -It's actually azalea. | 0:04:39 | 0:04:41 | |
-Like a garden azalea? -Yes. -Tiny, isn't it? | 0:04:41 | 0:04:45 | |
Living in a big landscape, there's no point in being big, | 0:04:45 | 0:04:48 | |
-it would just get blown away. -Yes. | 0:04:48 | 0:04:50 | |
-Exquisite, actually, when it's magnified like that. -Yes, yes. | 0:04:50 | 0:04:55 | |
Here's a little tip, turn your binoculars upside down and | 0:04:55 | 0:04:58 | |
they become a handy magnifying glass. But you've got to get really close. | 0:04:58 | 0:05:03 | |
Still no sign of the ptarmigan, a bird so uniquely adapted to | 0:05:10 | 0:05:14 | |
mountain life and camouflaged so well that it looks like a rock, and this, | 0:05:14 | 0:05:20 | |
need I say it, is a landscape dominated by rocks. | 0:05:20 | 0:05:24 | |
Birds, sometimes I can go off them, Nick. | 0:05:28 | 0:05:31 | |
Have you had no luck either? | 0:05:31 | 0:05:34 | |
-Still looking. -Feather, what d'you think, it's not a wood pigeon up here, is it? | 0:05:34 | 0:05:40 | |
No, it's an under feather from a ptarmigan, I would say. | 0:05:40 | 0:05:45 | |
And this, is the best piece of evidence yet. | 0:05:45 | 0:05:48 | |
Yeah. | 0:05:48 | 0:05:49 | |
-That's ptarmigan egg, isn't it? -Yes. | 0:05:49 | 0:05:51 | |
And it's been predated by a bird, look. Something's pecked into that. | 0:05:51 | 0:05:55 | |
So it has, yeah. | 0:05:55 | 0:05:57 | |
No toothmark here to suggest it would be a mammal. | 0:05:57 | 0:06:01 | |
-What do you think - crow? -You do get crows coming up | 0:06:01 | 0:06:04 | |
after bits of bread and stuff, that people have dropped. | 0:06:04 | 0:06:07 | |
They'll stay around if they can find anything like this to... | 0:06:07 | 0:06:10 | |
Just the one though. They do have quite a large clutch, don't they? | 0:06:10 | 0:06:14 | |
-Yeah. -Eight, nine, ten? | 0:06:14 | 0:06:16 | |
You see seven, eight, nine. | 0:06:16 | 0:06:18 | |
And we've got one. That's it. | 0:06:25 | 0:06:28 | |
-You've got one? -Yeah, rock at the back edge... | 0:06:28 | 0:06:31 | |
I got it, I've got it, I've got it! | 0:06:31 | 0:06:34 | |
The camouflage is absolutely remarkable, isn't it? | 0:06:34 | 0:06:37 | |
-How did you see it, because it was moving? -Yeah, that's the only thing. | 0:06:37 | 0:06:41 | |
Superb, superb. | 0:06:41 | 0:06:43 | |
Basically, a bird that's supremely adapted to this environment, | 0:06:43 | 0:06:48 | |
they've even got fluffy feet, haven't they, to keep them warm. | 0:06:48 | 0:06:52 | |
Yes, that's right. | 0:06:52 | 0:06:54 | |
Ptarmigan and grouse both have that. | 0:06:54 | 0:06:57 | |
And reduced amount of feeling in the soles of their feet as well. | 0:06:59 | 0:07:04 | |
They'll sit around in the snow quite happily. | 0:07:04 | 0:07:07 | |
Then we spotted this female had chicks. | 0:07:07 | 0:07:12 | |
The young are very vulnerable at first, it takes a while for them | 0:07:12 | 0:07:18 | |
to build up that tolerance and I think it'd be quite a loss at first. | 0:07:18 | 0:07:22 | |
But we do see seven and eight going around. | 0:07:22 | 0:07:26 | |
Unfortunately, if you come across them and you scatter them, | 0:07:26 | 0:07:29 | |
it takes the mother bird a while to collect them all up again. | 0:07:29 | 0:07:33 | |
That was brilliant, I honestly thought we'd had it. | 0:07:33 | 0:07:37 | |
I thought it was an eggshell, a feather and quite a lot of poo. | 0:07:37 | 0:07:40 | |
Which is a very poor substitute for the real thing. | 0:07:40 | 0:07:44 | |
So, with two of our three targets ticked off, | 0:07:47 | 0:07:49 | |
could we find the elusive snow bunting? | 0:07:49 | 0:07:52 | |
Well, just as the day was drawing to a close, listen to this. BIRD SINGS | 0:07:52 | 0:07:58 | |
Ahh, look at that. Just look at it. | 0:07:58 | 0:08:00 | |
Look at it, look at it, look at it. | 0:08:00 | 0:08:03 | |
Look at him singing! | 0:08:03 | 0:08:06 | |
This is ornithological nirvana. | 0:08:06 | 0:08:09 | |
That's a male snow bunting, and not only is it extremely rare, | 0:08:09 | 0:08:12 | |
there's only a handful of pairs here in the Highland, it's also | 0:08:12 | 0:08:16 | |
a beautiful little bird. That's a full adult - he's hopping around | 0:08:16 | 0:08:20 | |
all over the place. It's a full adult male, it's got that white head, | 0:08:20 | 0:08:24 | |
every now and again, look at that. | 0:08:24 | 0:08:27 | |
You see that little jagged bit on his beak which | 0:08:27 | 0:08:30 | |
he uses for breaking open the seeds. | 0:08:30 | 0:08:32 | |
What a dainty, dapper little bird! | 0:08:32 | 0:08:37 | |
It's a great place, harsh, hostile, even a little hostile for us today, | 0:08:39 | 0:08:44 | |
but nevertheless, a unique environment, isn't it? | 0:08:44 | 0:08:47 | |
It's difficult to think how fragile it is. | 0:08:47 | 0:08:50 | |
It doesn't look fragile on the face of it, but... | 0:08:50 | 0:08:52 | |
it doesn't take much of the climate change | 0:08:52 | 0:08:55 | |
and losing all the snow patches earlier and earlier. | 0:08:55 | 0:08:58 | |
A lot of the plants and animals we've seen today | 0:08:58 | 0:09:02 | |
are really struggling, because they are not getting the winter breaks | 0:09:02 | 0:09:07 | |
they used to get. | 0:09:07 | 0:09:09 | |
There's one thing wrong with this place - | 0:09:09 | 0:09:11 | |
that little tea room that should be just there | 0:09:11 | 0:09:14 | |
with Earl Grey and shortbread. | 0:09:14 | 0:09:17 | |
-Lovely idea! Let's go and find it. -We'll have to go down, | 0:09:17 | 0:09:21 | |
the business opportunities being wasted, seriously. | 0:09:21 | 0:09:24 | |
We should branch out, | 0:09:24 | 0:09:27 | |
branch out. | 0:09:27 | 0:09:28 | |
Cairn Gorm mountain is 10 miles from Aviemore. There's a mountain railway, | 0:09:31 | 0:09:35 | |
but you can't leave the summit building, so walking is best. | 0:09:35 | 0:09:39 | |
Call into the Cairn Gorm ranger base for wildlife and weather advice | 0:09:39 | 0:09:42 | |
and don't forget there's more information on our website: | 0:09:42 | 0:09:46 | |
OK, here's the health warning. | 0:09:51 | 0:09:54 | |
This place is much bigger than the English Lake District, and although | 0:09:54 | 0:09:58 | |
it can look terribly peaceful, even now in the middle of summer, | 0:09:58 | 0:10:02 | |
June, there's snow up here. So imagine what it's like in the winter. | 0:10:02 | 0:10:05 | |
If you're going to venture out here use some common sense. | 0:10:05 | 0:10:08 | |
Plenty of waterproof clothing, spare warm clothing, even a blanket. | 0:10:08 | 0:10:13 | |
And get a compass, and make sure you know how to use it. A whistle, so if you get lost... | 0:10:13 | 0:10:18 | |
..you can attract attention. | 0:10:18 | 0:10:19 | |
But perhaps most important of all, tell someone | 0:10:19 | 0:10:23 | |
exactly where you're going and when you expect to come back. | 0:10:23 | 0:10:26 | |
As I've said, it is much common sense, but it's worth using it. | 0:10:26 | 0:10:29 | |
Still, enough of that. | 0:10:29 | 0:10:31 | |
Coming up - Janet's on an adventure into an upland forest | 0:10:31 | 0:10:35 | |
and comes under ant attack. | 0:10:35 | 0:10:37 | |
It's an incredibly strong smell of vinegar. | 0:10:39 | 0:10:42 | |
Right, now we're heading south to the English Pennines, | 0:10:48 | 0:10:51 | |
a place which has one of the most bizarre landscapes. | 0:10:51 | 0:10:54 | |
You see, Yorkshire is given over to a lot of limestone, | 0:10:54 | 0:10:58 | |
and that comes with an incredible mix of plants and animals. | 0:10:58 | 0:11:01 | |
Mike Dilger started his trip at | 0:11:01 | 0:11:04 | |
the iconic, the amazing, the fabulous Malham Cove. | 0:11:04 | 0:11:08 | |
At 80 metres high, by 300 metres across, the cliffs at Malham Cove | 0:11:21 | 0:11:26 | |
scale quite comfortably into the top 10 geological wonders of Britain. | 0:11:26 | 0:11:31 | |
Check out the view. | 0:11:31 | 0:11:33 | |
The cove is a fantastic day out. It's such great walking country | 0:11:45 | 0:11:50 | |
and if you want to get to the top, you've got to start at the bottom. | 0:11:50 | 0:11:53 | |
And if you come in the summer months, May, June, July, | 0:11:53 | 0:11:57 | |
the RSPB and the National Park have set telescopes up here | 0:11:57 | 0:12:00 | |
for one of our most charismatic birds of prey. | 0:12:00 | 0:12:03 | |
The peregrine falcon. And if you come down, you can have a free peek. | 0:12:03 | 0:12:09 | |
Every where you look there's limestone, | 0:12:15 | 0:12:18 | |
in fact much of Yorkshire's famous drystone walls are made of it. | 0:12:18 | 0:12:21 | |
300 million years ago, this area would have been | 0:12:21 | 0:12:24 | |
covered by a shallow tropical sea. | 0:12:24 | 0:12:27 | |
And the bodies of the dead sea creatures have formed | 0:12:27 | 0:12:30 | |
the limestone that makes for such a stunning place to visit today. | 0:12:30 | 0:12:34 | |
Looks as hard as rock, doesn't it? | 0:12:38 | 0:12:40 | |
But isn't, because one of the key features of limestone is, | 0:12:40 | 0:12:43 | |
it's really susceptible to weathering. And this erosion causes | 0:12:43 | 0:12:47 | |
limestone pavements, which is what I'm off to discover now. | 0:12:47 | 0:12:51 | |
And some of the best limestone pavements are a few miles | 0:12:51 | 0:12:54 | |
to the north-east at the Ingleborough nature reserve. | 0:12:54 | 0:12:58 | |
What a brilliant lunar landscape. | 0:12:58 | 0:13:00 | |
I reckon this is the closest thing you'll get to the moon in Britain. | 0:13:00 | 0:13:04 | |
When you have a look around, the whole site is covered | 0:13:04 | 0:13:07 | |
by these massive slabs of rock. | 0:13:07 | 0:13:09 | |
They've got huge pitted fissures running throughout the whole site. | 0:13:09 | 0:13:14 | |
I know one of them is called a clint and the other one is called a gryke. | 0:13:14 | 0:13:18 | |
I can't remember which one's which, but I do know a man that does. | 0:13:18 | 0:13:23 | |
Phil Eckersley from English Nature is going to help me out. | 0:13:23 | 0:13:26 | |
Hi, Phil, have you got a nice spot there? | 0:13:26 | 0:13:27 | |
Yes, Mike, I've found a brilliant spot for flowers. | 0:13:27 | 0:13:29 | |
Wonderful. Now, put my mind at rest, | 0:13:29 | 0:13:32 | |
clints, grykes, I just can't remember which one's which? | 0:13:32 | 0:13:36 | |
It's dead easy, the clints are the big rocks on the top... | 0:13:36 | 0:13:39 | |
-What we're sitting on? -That's right. And the grykes are | 0:13:39 | 0:13:41 | |
these very thin fissures we can see in front of us here. | 0:13:41 | 0:13:45 | |
And the fissures or the grykes are brilliant for plants. | 0:13:45 | 0:13:48 | |
-Look at all these ferns down here. -We've got this limestone fern | 0:13:48 | 0:13:51 | |
-and this is another species down here. -What else have you got? | 0:13:51 | 0:13:55 | |
We've got dog's mercury, which is a real woodland plant. | 0:13:55 | 0:13:59 | |
Nothing beats it in my book for a really showy plant. | 0:13:59 | 0:14:02 | |
It's a real corker. | 0:14:02 | 0:14:05 | |
So the diversity is absolutely superb. | 0:14:05 | 0:14:07 | |
It's bizarre, when you look on top, in front of us and behind us, | 0:14:07 | 0:14:11 | |
there's very little growing on top, and it's a micro-climate. | 0:14:11 | 0:14:15 | |
It's completely different down here. Why? | 0:14:15 | 0:14:18 | |
It's a question of the two woodland conditions in lots of ways. | 0:14:18 | 0:14:21 | |
You've got very deep fissures, it's very shady in there, quite humid. | 0:14:21 | 0:14:26 | |
Sometimes a bit warmer than the top of the limestone pavement. | 0:14:26 | 0:14:30 | |
There's also some soil there which is washed down from above, | 0:14:30 | 0:14:33 | |
so you've got perfect conditions for a wide diversity of plants to grow. | 0:14:33 | 0:14:36 | |
I've brought my little DV camera here, so if I turn it on, | 0:14:36 | 0:14:40 | |
we should be able to kind of film some nice plants actually. | 0:14:40 | 0:14:45 | |
And if you use a camera, it avoids the risk of falling into the grykes. | 0:14:45 | 0:14:51 | |
But there are great plants growing on top of the limestone, too, | 0:14:51 | 0:14:54 | |
and Tim Thom from the National Park was on hand to show me | 0:14:54 | 0:14:57 | |
one of the best sites near Grassington. | 0:14:57 | 0:15:00 | |
It has to be said, when you get down on one level, there's only | 0:15:00 | 0:15:04 | |
one colour that dominates, but it's not buttercup. | 0:15:04 | 0:15:06 | |
No, it's rock rose, which is a real speciality | 0:15:06 | 0:15:10 | |
of the limestone here and it's looking fabulous today. | 0:15:10 | 0:15:13 | |
Fantastic, lovely papery petals, aren't they? | 0:15:13 | 0:15:15 | |
-Very delicate. -When you get close down, | 0:15:15 | 0:15:18 | |
-you suddenly realise there is a lot more species down there. -Yeah. | 0:15:18 | 0:15:20 | |
You've got to have a good look. | 0:15:20 | 0:15:22 | |
You've got thyme here, which is the real... | 0:15:22 | 0:15:25 | |
The smell of it, as you crush it or walk across it, | 0:15:25 | 0:15:28 | |
that kind of Mediterranean herb smell, it's fantastic. | 0:15:28 | 0:15:31 | |
Spaghetti bolognese. | 0:15:31 | 0:15:33 | |
And this delicate one, it's beautiful. | 0:15:33 | 0:15:35 | |
Yes, this is fairy flax, | 0:15:35 | 0:15:38 | |
a tiny little flower, but absolutely stunning, a wonderful little plant. | 0:15:38 | 0:15:41 | |
-They all love the lime conditions, and also the dry, stony conditions. -The very thin soil. | 0:15:41 | 0:15:46 | |
Yes, virtually no soil, a few centimetres, then you're down to this really hard base rock. | 0:15:46 | 0:15:51 | |
Of course, Tim, it's not just good for flowers, | 0:15:51 | 0:15:54 | |
it's good for insects and I think I've got a speciality of the site. | 0:15:54 | 0:15:58 | |
Yeah, it's the northern brown argus butterfly. | 0:15:58 | 0:16:00 | |
-That's the one. -Which is a real, unique butterfly for the Dales. | 0:16:00 | 0:16:04 | |
This sunshine that bringing it now. | 0:16:04 | 0:16:07 | |
But all is not sweetness and light in the Yorkshire Dales. | 0:16:09 | 0:16:11 | |
There's a battle under way in some of these upland rivers. | 0:16:11 | 0:16:15 | |
And it's one that's not going our way. | 0:16:15 | 0:16:18 | |
Hopefully, if you let the water go a bit still after you've got in, | 0:16:20 | 0:16:26 | |
you can sometimes see a... | 0:16:26 | 0:16:28 | |
Sitting very quiet on the bottom. | 0:16:28 | 0:16:30 | |
Something sticking out from under a rock, | 0:16:30 | 0:16:32 | |
have a look first, and then start | 0:16:32 | 0:16:35 | |
lifting some of the bigger rocks over. | 0:16:35 | 0:16:38 | |
We're looking for signs of a deadly alien invader | 0:16:39 | 0:16:42 | |
that's escaped from fish farms and entered the river system. | 0:16:42 | 0:16:47 | |
Wait until it clears and see if you've got one there. | 0:16:47 | 0:16:50 | |
Right, here we are. | 0:16:56 | 0:16:58 | |
-Have you got one? -Yeah. -I knew you'd be the first to find one. | 0:16:58 | 0:17:02 | |
-Here we go. -Oh, look at that. | 0:17:02 | 0:17:04 | |
-We were looking for crayfish weren't we? -Yes, exactly. | 0:17:04 | 0:17:07 | |
-But this is not welcome? -No, this is the American signal crayfish. | 0:17:07 | 0:17:12 | |
-It's oversexed, oversized and over here? -Much more aggressive | 0:17:12 | 0:17:16 | |
than our own crayfish. | 0:17:16 | 0:17:19 | |
-Crikey! -You can see what it's doing there. | 0:17:19 | 0:17:21 | |
It's curling its back. If that was in the water, it would be lying up | 0:17:21 | 0:17:25 | |
like this with its claws in the air, basically saying, "Get off, | 0:17:25 | 0:17:29 | |
-"I'll beat you up." -A very aggressive posture. | 0:17:29 | 0:17:32 | |
-Yeah. -We've got our own native crayfish, the white-clawed crayfish, | 0:17:32 | 0:17:35 | |
but how are these doing our native crayfish in? | 0:17:35 | 0:17:39 | |
They are bigger and more aggressive, | 0:17:39 | 0:17:40 | |
they're directly competing with our own crayfish, they'll attack them, | 0:17:40 | 0:17:44 | |
and eat them. | 0:17:44 | 0:17:45 | |
The other problem, Tim, is they carry a plague. | 0:17:45 | 0:17:48 | |
Yeah, these guys have all sorts of weapons and they've got | 0:17:48 | 0:17:51 | |
this biological weapon, which is called crayfish plague. | 0:17:51 | 0:17:54 | |
These carry it, but they're immune to it, but our British crayfish | 0:17:54 | 0:17:57 | |
are very susceptible. And if you get crayfish plague in a river, | 0:17:57 | 0:18:01 | |
it can wipe out the entire population of British crayfish within weeks. | 0:18:01 | 0:18:05 | |
Our under-fire British crayfish are just about hanging on | 0:18:08 | 0:18:13 | |
in streams and tributaries, but to see them | 0:18:13 | 0:18:16 | |
we'll have to wait until dark, as that's when they come out to hunt. | 0:18:16 | 0:18:20 | |
These British survivors have been tagged so their progress can be monitored. | 0:18:20 | 0:18:25 | |
-Hey, here we go. -That's the native, British white-clawed crayfish. | 0:18:28 | 0:18:33 | |
A lot smaller, as you can see. | 0:18:33 | 0:18:35 | |
These guys really are just not tough enough to cope | 0:18:35 | 0:18:38 | |
with the invasion of the signal crayfish. | 0:18:38 | 0:18:40 | |
At the moment, they're safe, | 0:18:40 | 0:18:42 | |
although we've started recording signal crayfish in the bottom end of the beck. | 0:18:42 | 0:18:46 | |
So, really given what we know from other rivers, it's only | 0:18:46 | 0:18:51 | |
a matter of time before signal crayfish make their way up here. | 0:18:51 | 0:18:55 | |
Let's hope the tide turns in their favour. | 0:18:55 | 0:18:58 | |
But what a landscape, and if you want to explore limestone country, | 0:18:58 | 0:19:02 | |
then it extends across the Yorkshire Dales and into Lancashire. | 0:19:02 | 0:19:07 | |
Access to Malham Cove is free, and you can get more information | 0:19:07 | 0:19:11 | |
from the Yorkshire Dales National Park Visitor Centre in Malham. | 0:19:11 | 0:19:14 | |
More details are on our website. | 0:19:14 | 0:19:17 | |
OK, up here in the north of the British Isles, and especially at this | 0:19:24 | 0:19:28 | |
altitude, it's very much a question of survival when it comes to nature. | 0:19:28 | 0:19:33 | |
Down in the south of England, conditions are different - | 0:19:33 | 0:19:36 | |
the hills are lower and the climate is much milder | 0:19:36 | 0:19:39 | |
and you get a much greater range of plants and animals. | 0:19:39 | 0:19:42 | |
Janet Sumner started her journey | 0:19:42 | 0:19:44 | |
on top of Dartmoor, the largest area of moorland in the south of England. | 0:19:44 | 0:19:48 | |
Dartmoor National Park, the largest and wildest area | 0:19:55 | 0:20:00 | |
of open country in southern England, and one of the few southern uplands. | 0:20:00 | 0:20:04 | |
Most of the park's 368 square miles lie on a granite plateau which rises | 0:20:04 | 0:20:09 | |
to 2,000 feet above sea level. | 0:20:09 | 0:20:12 | |
It was nearly 300 million years ago, that molten rock | 0:20:17 | 0:20:21 | |
started to rise up to the surface here, but it didn't quite make it. | 0:20:21 | 0:20:25 | |
It cooled down really slowly over time, and gave us these beautiful, | 0:20:25 | 0:20:28 | |
big crystals which are so characteristic of granite rock. | 0:20:28 | 0:20:32 | |
I'm sat on Hey Tor, which is one of 160 windows | 0:20:36 | 0:20:40 | |
into that once molten world. | 0:20:40 | 0:20:43 | |
Now, the reason the granite's exposed today, is that thousands of years of weather | 0:20:43 | 0:20:48 | |
have stripped away the overlying rocks | 0:20:48 | 0:20:51 | |
and it's left the most fantastic feature. | 0:20:51 | 0:20:55 | |
To explore the diverse nature of the moor, I'm starting out here at | 0:20:55 | 0:20:59 | |
1500ft and I'll be dropping down through ever-changing habitat. | 0:20:59 | 0:21:04 | |
Now, altitude makes a big difference to nature and as a rule of thumb | 0:21:04 | 0:21:08 | |
for every 300ft that I'd go down, it'll get one degree warmer. | 0:21:08 | 0:21:13 | |
Only the very hardiest breeds of livestock can survive | 0:21:17 | 0:21:22 | |
the winter conditions up here, like these guys, the Dartmoor ponies. | 0:21:22 | 0:21:27 | |
They help to maintain the moor by munching, and they'll eat anything. | 0:21:27 | 0:21:31 | |
Grass, heather, | 0:21:31 | 0:21:33 | |
they'll even eat gorse after bashing it to get the prickles off. | 0:21:33 | 0:21:37 | |
All this munching is crucial to keep the moor as it is | 0:21:38 | 0:21:42 | |
otherwise it would soon return to shrub and woodland. | 0:21:42 | 0:21:45 | |
Now, I mentioned the importance of temperature and altitude, | 0:21:47 | 0:21:51 | |
well, look down there, that huge wood is set in a valley. | 0:21:51 | 0:21:55 | |
It's only a few miles away, but it's 800 or 900ft lower | 0:21:55 | 0:21:59 | |
and there we'll find breeding birds | 0:21:59 | 0:22:01 | |
that would really struggle to survive up here. | 0:22:01 | 0:22:04 | |
This is Yarner Wood, and in spring | 0:22:13 | 0:22:16 | |
it's a great place for nesting birds. | 0:22:16 | 0:22:18 | |
Including a little migrant | 0:22:18 | 0:22:20 | |
that flies thousands of miles from West Africa to use the nest boxes. | 0:22:20 | 0:22:24 | |
All under the watchful gaze of warden, Phil Page. | 0:22:24 | 0:22:28 | |
Here is a classic example of a bird of oak woodland in upland Britain. | 0:22:28 | 0:22:33 | |
It's a pied flycatcher. | 0:22:33 | 0:22:35 | |
That's the female on the branch there? | 0:22:35 | 0:22:38 | |
-She's much greyer than the male? -I would say browner, really. | 0:22:38 | 0:22:42 | |
There he is, he's gorgeous. | 0:22:42 | 0:22:43 | |
He'll be singing to proclaim - this is my territory. | 0:22:43 | 0:22:48 | |
We can't really get any closer than this can we? | 0:22:48 | 0:22:51 | |
No, this is a safe distance. But because we're on a path, | 0:22:51 | 0:22:53 | |
they're pretty used to people. | 0:22:53 | 0:22:55 | |
That's another thing - we've got the right clothes on. | 0:22:55 | 0:22:58 | |
But you'd be amazed at the number of people who come to see birds | 0:22:58 | 0:23:02 | |
and they've got reds and yellows and birds are sensitive to colours. | 0:23:02 | 0:23:06 | |
If you want to see the birds, you've got to wear the right clothing. | 0:23:06 | 0:23:10 | |
-Look, there's a tree creeper. -Oh yes, I see it! | 0:23:10 | 0:23:13 | |
It's working its way up the tree. | 0:23:13 | 0:23:15 | |
-So he's turning the bark over to get to the insects? -Yes, yes. -Fantastic. | 0:23:15 | 0:23:20 | |
-The other one which behaves in a similar way is the nuthatch. -Which comes DOWN the tree? -Yes. | 0:23:20 | 0:23:25 | |
The tree creeper goes up. | 0:23:25 | 0:23:28 | |
Some of the nest boxes are providing a warm home | 0:23:29 | 0:23:33 | |
for a group of tiny mammals. | 0:23:33 | 0:23:35 | |
Have a look in here and see what we've got in this one. | 0:23:40 | 0:23:45 | |
Ah ha. | 0:23:45 | 0:23:47 | |
Dormice, not just one dormouse, but several dormice in here. | 0:23:47 | 0:23:53 | |
-Here we go. -It's just come out and scurried off up the tree. | 0:23:53 | 0:23:57 | |
I can't believe it. | 0:23:57 | 0:23:59 | |
That's such a special moment, I've never seen a dormouse before | 0:23:59 | 0:24:03 | |
and I had no idea they lived up trees. And the sad thing is, | 0:24:03 | 0:24:07 | |
they're in decline all over the country, except for Devon. | 0:24:07 | 0:24:09 | |
They're doing really well here, thank goodness. | 0:24:09 | 0:24:12 | |
Now, because of their rarity, you can't handle dormice unless you have a special licence like Phil. | 0:24:12 | 0:24:18 | |
So it's time to put them back and allow them to return | 0:24:18 | 0:24:21 | |
to their favourite occupation - sleeping. | 0:24:21 | 0:24:23 | |
Now, for a truly remarkable creature. | 0:24:27 | 0:24:30 | |
We often walk past lots of nature, simply because it's on a different scale, like this for instance. | 0:24:30 | 0:24:36 | |
It's a wood ant's nest and you could easily walk past it, but there are | 0:24:36 | 0:24:40 | |
hundreds of them in this wood, with an estimated 200 million ants | 0:24:40 | 0:24:44 | |
living in them. It seems like most of them are right here. | 0:24:44 | 0:24:48 | |
They're actually repairing this nest at the moment, which is why there's loads and loads of activity. | 0:24:54 | 0:24:59 | |
Now, they don't sting, but as well as biting, they'll actually squirt | 0:24:59 | 0:25:03 | |
formic acid out of their bottoms and they do that when they're alarmed. | 0:25:03 | 0:25:07 | |
I can alarm them with his pencil. | 0:25:07 | 0:25:09 | |
It's an incredibly strong smell of vinegar. | 0:25:13 | 0:25:17 | |
That's enough to scare off the birds. | 0:25:17 | 0:25:20 | |
The birds won't be able to eat these ants. | 0:25:20 | 0:25:23 | |
I have now reached the lowest part of my journey, | 0:25:25 | 0:25:30 | |
the Bovey River Valley. Dartmoor ecologist Sue Goodfellow | 0:25:30 | 0:25:34 | |
is going to show me something special, | 0:25:34 | 0:25:36 | |
something I could easily miss. | 0:25:36 | 0:25:38 | |
Here's a good tree. | 0:25:39 | 0:25:41 | |
We've got quite a variety of species here and you can see their different | 0:25:41 | 0:25:45 | |
shapes and structures. | 0:25:45 | 0:25:47 | |
And these are the lichens we're looking for, the chaps we've come to find? So, what's this one called? | 0:25:47 | 0:25:53 | |
That's the knicker elastic lichen. | 0:25:53 | 0:25:56 | |
OK, well, I've got a piece I picked up on the path and I'm going to test | 0:25:56 | 0:25:59 | |
to see if it's really worth its name. | 0:25:59 | 0:26:02 | |
I'm going to pull it very gently apart... | 0:26:02 | 0:26:06 | |
There, you can actually see the knicker elastic in there. Fantastic. | 0:26:06 | 0:26:11 | |
OK, so we've got knicker elastic, what else have we got? | 0:26:11 | 0:26:15 | |
Um, this is Cladonia. | 0:26:15 | 0:26:17 | |
If you look at it through that, see what you can see. | 0:26:17 | 0:26:20 | |
Now, lichen are an amazing combination of two types of life, | 0:26:20 | 0:26:24 | |
fungi and algae. And close up you can see a little red tip, from where | 0:26:24 | 0:26:28 | |
fungal spores will fly off to find new algae and create a new lichen. | 0:26:28 | 0:26:33 | |
There are many species along the valley, | 0:26:33 | 0:26:36 | |
all sensitive to the quality and condition of the air around us. | 0:26:36 | 0:26:40 | |
What is it with you and lichens? | 0:26:40 | 0:26:44 | |
Well, they're beautiful and they also tell us | 0:26:44 | 0:26:47 | |
so much about the environment. | 0:26:47 | 0:26:48 | |
They're clues to what's happened in the past, and what's around us now. | 0:26:48 | 0:26:54 | |
You can tell what the air is like. You can tell how much it rains, | 0:26:54 | 0:26:58 | |
you can tell what's happened to the structure the lichen is growing on. | 0:26:58 | 0:27:02 | |
They're absolutely fascinating. | 0:27:02 | 0:27:04 | |
Now, if you've not got your own personal lichen guide like Sue, | 0:27:06 | 0:27:10 | |
you want to get yourself one of these, a leaflet or book | 0:27:10 | 0:27:14 | |
that'll help you identify the different kind of lichens. | 0:27:14 | 0:27:17 | |
Now, I've actually found oak moss, and I know for a fact, | 0:27:17 | 0:27:22 | |
this was used as a fixative in the perfume industry. | 0:27:22 | 0:27:26 | |
That means it's ground up and the perfume scents are added to it. | 0:27:26 | 0:27:31 | |
It's this stuff that keeps the smell of the perfume on your skin. | 0:27:31 | 0:27:35 | |
If you're not completely sure, | 0:27:35 | 0:27:39 | |
the best thing to do is to... | 0:27:39 | 0:27:41 | |
get a snap of it, | 0:27:41 | 0:27:43 | |
take it home and identify it properly. | 0:27:43 | 0:27:47 | |
Yarner Wood is part of the East Dartmoor Woods and Heath Reserve | 0:27:47 | 0:27:52 | |
which includes moorland and the Bovey River Valley. | 0:27:52 | 0:27:55 | |
It's two miles from Bovey Tracey in Devon. | 0:27:55 | 0:27:57 | |
There's plenty to see all year round and it's free. | 0:27:57 | 0:28:00 | |
If you're into spotting lichen, the Field Studies Council at Shrewsbury | 0:28:00 | 0:28:04 | |
has produced an inexpensive guide. | 0:28:04 | 0:28:07 | |
Sadly, that's all we have time for. | 0:28:09 | 0:28:11 | |
Time for me to take one more picture. If you've heard that once, | 0:28:11 | 0:28:16 | |
I'm sure you've heard it a thousand times. | 0:28:16 | 0:28:18 | |
Nevertheless... SHUTTER CLICKS | 0:28:18 | 0:28:21 | |
..it's got to be worth it. | 0:28:21 | 0:28:23 | |
Excellent. See you next time for some more Hands On Nature... | 0:28:23 | 0:28:27 | |
..when Mike Dilger enjoys the delights of the Somerset Levels. | 0:28:28 | 0:28:32 | |
That's Britain's heaviest bird taking off. | 0:28:34 | 0:28:37 | |
And Sanjida O'Connell takes a walk on the wild side. | 0:28:37 | 0:28:40 | |
The reason I've come here is to see a rather mysterious creature | 0:28:40 | 0:28:44 | |
which sounds a bit like this... | 0:28:44 | 0:28:46 | |
DEEP HOOT | 0:28:46 | 0:28:48 | |
Subtitles by Red Bee Media Ltd | 0:28:49 | 0:28:52 |