Figure 1 Two male adders basking. They have just emerged from hibernation in Britain in March. Note how well camouflaged they are in the surrounding bracken. The male on the outside has flattened his body to increase the surface area for maximum heat absorption from the weak spring sun
Nigel Hand
Reptile
Ectotherm
Your organisation does not have access to this article.
Sign up today to give your students the edge they need to achieve their best grades with subject expertise
Subscribe