I had a tufted titmouse crash into my window and injure his wing. It was apparent he would not be able to care for himself, so I caught him to take him to an animal rescue place.
Did you know those tiny little beaks can bite the fire out of you????
I finally got him while wearing my garden gloves, and he lived the rest of his wretched miserable little life (just kidding) in the rescue place.
I would imagine they can bite. We have a cranky, aged parakeet who can inflict bodily harm with his beak. He nips that soft bit of skin on your hand between the thumb and index finger and has brought blood. Once he latches on he hangs on for dear life. He’s lucky he’s made it to old age!