DR MORLEY READ / SCIENCE PHOTO LIBRARY DR MORLEY READ / SCIENCE PHOTO LIBRARY
Glass frog (Centrolene euknemos). This frog inhabits trees and other vegetation over streams in the forests of South America. It is named for the translucent skin on its underside, through which its internal organs can be seen. Each toe ends with a sucker that is used to grasp leaves and stems. It feeds on insects and other invertebrates and reaches a maximum length of 3 centimetres. Photographed in the Amazon rainforest, Ecuador.
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