fledging

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.

Source: https://en.wiktionary.org/wiki/fledge, https://en.wiktionary.org/wiki/fledging