Originally Posted by MachThreeSlug

You can get bloom birds from the Whale Airship shop under Exchange or from the missions under the "Concept" tab when you select "Campaign" from the side menu.

Hmm... well, I can't do whale stuff yet so I don't have any sun medals (maybe I'm going too far for where I'm currently at...?), although I can afford one bird if I spend all of my honor medals on getting sun medals, would that be a stupid idea?