ALEX HYDE / SCIENCE PHOTO LIBRARY ALEX HYDE / SCIENCE PHOTO LIBRARY
Common pipistrelle bat (Pipistrellus pipistrellus) wing, backlit to show its structure. The bat's wings is a modified forearm, with a membrane between the bones that is an extension of the skin. The elbow joint can be seen at left. At top centre is the wrist joint, which has a thumb (top) and four fingers coming off of it. The membrane contains blood vessels (light lines) and muscles. This specimen was collected in Derbyshire, UK.
Model release not required. Property release not required.