aerial locomotion

Aerial locomotion, or flight, in zoology refers to the movement of animals through the air. This can be categorized into two main types: powered flight and gliding. Powered flight, found in insects, birds, and bats, involves generating thrust by flapping wings. This requires significant evolutionary modifications, such as specialized wings, lighter bones, and enhanced respiratory and circulatory systems.1234

Gliding, on the other hand, is a form of aerial locomotion where animals use specialized body structures to slow their descent and travel horizontally through the air, often relying on gravity or air currents. Examples include gliding frogs, lizards with extended ribs, and mammals like flying squirrels that possess skin folds called patagia. The evolution of flight is a complex topic, with ongoing debates about whether it originated from arboreal gliding or terrestrial running ancestors.516