When I try to draw birds from my imagination, without any reference, the results are mixed... (Although, I do like the little peacock-type bird in the middle. But some of these look more like slugs than birds.)
A pigeon: they are so pesky, but not very bright. There were a few pigeons and a few small birds. The small birds would swoop in and steal whatever crumb the pigeons were pecking at, then fly away with the crumb.
Some other sketches of birds I made: