Darkvision: 60 feet.

Flight: Avians have a flying speed of 30 feet. They can only fly if they are not wearing medium or heavy armor.

Talons: Avians deal unarmed strikes with 1d4 slashing damage.

Silent: Owls gain proficiency in Stealth.

Still as the grave: While in dim light or darkness and not moving, Owls are considered invisible to creatures relying on sight unless they pass a Perception check vs the Owl's Stealth DC. Owls have advantage on saving throws against being blinded.