Volant adaptations are the adaptations in  animals which are capable of flying.
As atmospheric environment is characteristically lighter than any of the other habitats like aquatic or terrestrial, there is less friction from air to the organism which is flying,mainly birds.
Volant adaptations are usually adaptations which help them in flying like:
1. Body covered with feathers.
2. Light and fused bones
These adaptations help them to propel their body during flight.