Preview Subtitle for Insatiable


If preview looks OK then Download subtitles


0
00:00:01,000 --> 00:00:04,000
Downloaded From www.SubsMax.com

1
00:00:37,160 --> 00:00:43,315
If you travel by air, it's very important
to keep your weight down to a minimum.

2
00:00:47,320 --> 00:00:51,279
You can't afford to carry a lot of fuel around,

3
00:00:51,480 --> 00:00:56,315
and what you do carry should be energy-packed
and not too bulky.

4
00:00:56,520 --> 00:01:01,071
0ak trees put just such a substance
into their acorns.

5
00:01:01,280 --> 00:01:07,037
It's there to fuel the growth of their seedlings,
and they protect it with a hard shell,

6
00:01:07,240 --> 00:01:10,118
but jays know how to deal with that.

7
00:01:23,040 --> 00:01:26,316
A beak is itself a concession to weight-saving.

8
00:01:26,520 --> 00:01:32,709
It's much lighter than the jaws and teeth that
reptiles and mammals use to process their food,

9
00:01:32,920 --> 00:01:36,799
yet it's also very efficient and versatile.

10
00:01:39,560 --> 00:01:42,552
A jay using its beak like a pick

11
00:01:42,760 --> 00:01:47,470
can cut through an acorn's armour
without any difficulty.

12
00:01:48,320 --> 00:01:51,198
Beaks are closely matched to diet.

13
00:01:51,400 --> 00:01:56,110
A goldfinch uses its beak like a pair of tweezers.

14
00:01:56,320 --> 00:02:02,759
It's just the right length for extracting the seeds
from between a teasel's spines.

15
00:02:06,320 --> 00:02:09,437
A blue tit, on the other hand, has a stubbier beak.

16
00:02:09,640 --> 00:02:12,871
That gives it the strength to crack small seeds,

17
00:02:13,080 --> 00:02:17,232
but it also prevents its owner from
getting them from a teasel

18
00:02:18,280 --> 00:02:21,716
A greenfinch's beak is even stouter and stronger,

19
00:02:21,920 --> 00:02:23,831
but it's far from clumsy.

20
00:02:24,040 --> 00:02:26,508
Watch how, with the help from its tongue,

21
00:02:26,720 --> 00:02:32,590
the bird delicately removes the outer shell
of these rosehip seeds.

22
00:02:35,960 --> 00:02:40,238
The strongest beak in the finch family
belongs to the hawfinch.

23
00:02:40,440 --> 00:02:43,352
That can even deal with the cherry-stone.

24
00:02:43,560 --> 00:02:47,075
But the bird doesn't simply rely on brute force.

25
00:02:47,280 --> 00:02:54,038
First, it manoeuvres the cherry-stone into
the right position for easy cracking.

26
00:02:55,040 --> 00:02:57,838
It gets rid of the broken shell...

27
00:02:59,080 --> 00:03:06,270
..and now it starts the fiddly operation of
removing the husk that covers the kernel

28
00:03:23,760 --> 00:03:26,672
Pine trees, these are in California,

29
00:03:26,880 --> 00:03:30,634
protect their seeds by enclosing them in cones.

30
00:03:30,840 --> 00:03:36,472
When they're still green, the seeds developing
within are beyond the reach of most birds.

31
00:03:37,960 --> 00:03:43,318
But the cross-bill has special equipment.

32
00:03:43,520 --> 00:03:49,038
It's the only finch that can twist its upper
and lower bill in opposite directions.

33
00:04:04,640 --> 00:04:11,239
Now, right at the bottom, it can feel
the soft young seed with its tongue.

34
00:04:14,000 --> 00:04:16,275
Got it!

35
00:04:19,400 --> 00:04:21,709
After a meal of pine seeds,

36
00:04:21,920 --> 00:04:27,995
these American cross-bills regularly fly off to
a bank of exposed clay.

37
00:04:28,200 --> 00:04:31,272
They're
[...]
Everything OK? Download subtitles