those are usually ravens and crows but those look nice. The reason I pointed out chicken heads is the red part of a rooster or chicken on their face flapping about is what creeps me out xD. Edit: Also usually they are wearing masks or have human forms with a human face.
[Search... Found] {Unya? Without the smell, it's not so bad} Spoiler [Search... Found] Spoiler [Search... Found] Try reading Boku no Hero Academia. Or... Spoiler There's also the problem with how much 'non-human' the subject would have to be.