Nestlings open their eyes after between six and eight days, and grow feathers starting at eight days post hatching (although quills emerge as early as two days after hatching).[5] Adult feather length is reached after twenty days.[5] Nestlings reach adult weight after about 38 days, and gain independence between 30 and 50 days post-hatching.[3] The young may remain in the parent's territory for a while after fledging,[4] but will be driven off by the next breeding season.