Green lizards are native to the channel islands, and have emerald bodies and a distinctive blue head in the males. The British climate is not ideal for the lizard to live wild here. Ours bred successfully in 2000 and have laid eggs every year since, but these have not hatched. Mature males and some females have blue throats, which are especially brilliant in the early summer mating season. Lizards can shed their tails if danger threatens, using muscle contractions to split one of their tail vertebra along a fracture plane designed for just this purpose. This leaves their attacker with a twitching tail to distract them, while the lizard escapes unnoticed to fight another day.