David Attenborough, British naturalist
David Attenborough. Caricature of the British naturalist and broadcaster Sir David Frederick Attenborough (born 1926) holding a frog. Attenborough is most famous for the numerous BBC television nature documentaries he has presented. In the 1960s and 1970s he was controller of BBC Two and director of programming for BBC Television. His awards include Commander of the Order of the British Empire (1974), Fellow of the Royal Society (1983), Knight Bachelor (1985), Commander of the Royal Victorian Order (1991), Companion of Honour (1996) and the Order of Merit (2005).
© GARY BROWN/SCIENCE PHOTO LIBRARY
Xenopus frog, X-ray
Xenopus laevis frog, coloured X-ray. This frog is widely used in biology as a model organism, as its egg cells are large and easy to manipulate in the laboratory. It is also popular in the pet trade, where it is usually known by its common name, the African clawed frog. It is almost exclusively aquatic, using its powerful back legs for swimming and burying itself in the mud, rather than for jumping like terrestrial frogs.
© Michel Delarue, Ism/Science Photo Library
Red-eyed tree frog
Red-eyed tree frog (Agalychnis callidryas) climbing through foliage. This frog is found in the tropical rainforests of central America. As its name implies, it lives in trees and other vegetation. Each toe ends with a sucker, which is used to grasp leaves and stems. It is primarily nocturnal, and feeds mainly on insects such as moths, grasshoppers and flies. It has been known to eat smaller frogs. It can reach a length of around seven centimetres. Its bold colouration has made this frog popular in the pet trade.
© DAVID AUBREY/SCIENCE PHOTO LIBRARY