Successfully complete the indicated task to unlock the corresponding achievement.

Achievement	How to unlock
Been There Done That	Collect all feathers, listen in on all major conversations and finish the story.
Fully Fledged	Collect all feathers.
My Precious	Add a trinket to your nest.
Retweet	Attract attention from a walking citizen.
So High Right Now	Fly high.
Unnoticed	Listen in on all major conversations.