Fledglings are interesting to watch. They know how to fly, but they're not very good at it, so they'll do things you wouldn't see other birds do. They'll accidentally land on other birds, fly in wavy, meandering patterns, flap their wings way more than they should, and basically act like toddlers learning to walk. Of course, that's essentially what they are. At that stage, they probably haven't learned calls or songs yet, so they just make a bunch of noise, also much like toddlers. From now on, I might start referring to toddlers as "fledglings."