1. Birds cannot play foosball.
2. Birds have hollow bones.
3. Most birds are able to fly.
4. The penguin, ostrich, emu, kiwi, and chicken cannot fly.
5. Technically the chicken can fly; the longest recorded chicken flight is 13 seconds.
6. The book Jonathan Strange and Mr. Norrell by Susanna Clarke (absolutely amazing book) has a raven's silhouette on the cover.