fledge

Short definition from Wiktionary

Verb

1. 1
   To care for a young bird until it is capable of flight.
2. 2
   To grow, cover or be covered with feathers.
3. 3
   To decorate with feathers.
4. 4
   To complete the last moult and become a winged adult insect.

Adjective

1. 1
   Feathered; furnished with feathers or wings; able to fly.