Iguanas can freeze and fall from trees, then become easy prey; pythons can shiver to stay alive from the cold weather.

Marine iguana: Physical description Marine iguanas ... Marine iguanas are highly social animals and are often seen in large groups, basking in the sun to regulate their body temperature.

The marine iguana (Amblyrhynchus cristatus ... These iguanas spend much of their time basking on volcanic rocks to regulate their body temperature, but they are also expert divers, swimming through ...