wing

Wings produce lift through their airfoil cross-section: typically curved on top (dorsal) and flatter beneath (ventral), generating differential air pressure (lower pressure above, higher below) as air flows over the surface. The aspect ratio, camber, and angle of attack all affect lift generation.

Bird wings are modified forelimbs with feathers attached to modified arm and hand bones. Bat wings are also forelimbs, but the wing membrane (patagium) stretches between elongated fingers, body, and hind limb. Insect wings are cuticular outgrowths of the thorax, not modified limbs, representing a fundamentally different evolutionary origin.

No. Bird and bat wings are homologous as modified tetrapod forelimbs sharing common ancestry. Insect wings are analogous — they evolved independently to serve the same aerodynamic function but represent a different structural origin. This is a classic example of convergent evolution.