Readings & Meanings:
feather, wing, （わ － counter for birds）
In the park, a pigeon suddenly flapped its wings.
I sleep with a feather-down quilt.
Yesterday I had a dream in which I sprouted wings on my back.
羽 is its own radical. It's also a picture of bird feathers. It's used in a few other kanji. My favorite is 習う, to learn. Kanji Networks explains the connection as thus:
repeated flapping of a bird's wings against its body → learn (← learn by repetition ← repeated action) → accustomed; custom; take lessons.But I prefer to think of learning as taking your mind on a flight of thought. Not very old-Japanese of me, I guess.