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The 'Busy' Life of the Sloth | BBC Earth - Video học tiếng Anh
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The 'Busy' Life of the Sloth | BBC Earth
The 'Busy' Life of the Sloth | BBC Earth
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Phụ đề (41)
0:00
In this tree, there is one of the most extraordinary plant predators.
0:08
It's one animal that I don't need to sneak up on.
0:14
Boo!
0:17
This extraordinary creature is half-blind, half-deaf
0:22
and this is just about as fast as it can move.
0:26
That's what can happen to you if you live on nothing but leaves.
0:32
It's a sloth.
0:34
It's not exactly an enthusiastic leaf-eater.
0:38
A couple of half-hearted chews
0:40
and the leaves go straight down to its stomach.
0:44
Leaves, however, are not easily digested.
0:48
The sloth's technique is to give them time.
0:55
Then, eventually, this mobile compost heap pulls itself together
1:00
and starts on a long and dangerous journey.
1:05
This is a very unusual sight, a sloth in a hurry.
1:10
It wants to defecate and the only place it is happy doing that, oddly enough,
1:15
is down on the ground.
1:18
It only does it about once a week...
1:21
but why does it come down to the ground to do it?
1:25
And why does it nearly always choose to do so in exactly the same place?
1:30
Whatever the reason, it must be very important,
1:33
for a sloth on the ground is almost helpless.
1:37
Any predator could attack it and it doesn't have the speed to escape.
1:42
Why it comes down in this way is a mystery.
1:46
Nobody knows.
1:48
Now it's finished and back it goes, up to the safety of the canopy.
1:55
Leaves are not very nutritious.
1:57
The sloth's way of compensating for that is not to eat more, but to do less.
2:02
Its claws hook over the branches,
2:04
so that the sloth can hang without any effort of its muscles,
2:08
which have been reduced to thin ribbons.
2:10
And to save energy, it spends most of its time hanging around,
2:14
half-asleep, in the tree-tops.
2:19
So with very little muscle
2:21
and a reaction time only a quarter as fast as ours,
2:25
how does a sloth's day compare with our day?
2:30
In the time it takes me to write a few letters,
2:32
the sloth just about manages to groom itself.
2:36
While we have our lunch, the sloth nibbles a few leaves.
2:41
And then, as we film a sequence for the series,
2:44
it's time for another nap.
