Wiktionary
birdishness
n. The quality of being birdish.
Usage examples of "birdishness".
He didn't talk up the miracle of a raw bullet hole turning into a scar, just like that, from one moment to the next, bruises disappearing like they never were, but he did search and find the right words to describe the birdishness of the girls who had dropped in from who knew where to help him out.
She looked at him, seeing the birdishness still in his stock-thin frame and his shining eyes, but seeing the illness now as well.