Age Isn't Everything

00:00:37 Reptiles and amphibians are sometimes thought of

00:02:50 And thats just the beginning.

00:04:43 Now they need to feed.

00:06:51 A recently emerged iguana is black.

00:08:53 Intruders are confronted immediately and if necessary attacked.

00:11:23 They investigate the world around them by tasting it

00:13:05 And sitting on arums brings another benefit.

00:15:37 are active no matter how cold it is

00:18:58 Less well-armoured reptiles like lizards

00:20:46 I guess he has warmed up quite a lot.

00:23:06 It like most geckos is nocturnal

00:25:17 If it had been a few degrees lower

00:27:55 that they built up when the feeding was good.

00:31:23 By collecting solar power so efficiently

00:33:50 But its able to push the top of its windpipe right out of its mouth

00:37:13 It takes quite a time for them to become fully functional

00:41:02 with a smaller younger one trotting alongside

00:43:14 This is the leg bone of a young Tyrannosaurus

00:45:29 They are emerging from her body

00:47:36 And now shes on her way back to the sea.

00:50:27 Now I was back and this time reptiles were our sole subject.

00:52:46 ATTENBOROUGH: This one was far from upset at being woken up.

00:55:01 But now with Bertrand as my guide we could search

02:00:00 on this one tiny island.