Description
Unlike birds, which have wings mostly made of feathers, the wings of pterosaurs are made of skin, more like a modern bat. However, the skin membrane of the batﾡﾯs wing is supported by four really long fingers. A pterosaur wing has only one long finger supporting its leading (front) edge. So, although the pterosaur wing and bat wing are superficially similar, they are quite different under the skin. Pterosaurs lived on earth for a long time, so there are many different kinds.
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