- catkan11Lv 71 decade agoFavorite Answer
Lizards that swim in sand
The shovel-snouted lizard performs a "thermal dance" when the sand becomes too hot for its feet. It props itself up on its tail, lifts a front foot and back foot, holds them up for a while and finally exchanges them with the opposite pair.
The dance is repeated over and over again until the sand cools down a bit. When all else fails the lizard dives into the loose sand and "swims" down to a cooler level.
Lizard species with the right stuff are called "sand-diving" or "sand-swimming" lizards. Typically their snout is streamlined to ease entry into the sand and minimise resistance as they swim through it; their nostrils are on top of the snout to keep sand out; they are splay-legged and their toes are elongated.
When a lizard wants to cool down or feels threatened, it dives head-first into the sand and is gone in an instant. With air trapped between the sand grains, the lizard can remain buried for 24 hours or longer -- half a metre down -- without any ill effects.
If it finds itself on the surface when rain falls, it is in trouble, because the sand becomes too firm for it to penetrate. Stranded above ground, it is easy prey for predators.
- 1 decade ago
好像是野狼....我在電視中看過 XDSource(s): tv program
- Tsz YingLv 61 decade ago