rule 34 1boy anthro antigone genus anus artist name ass avian balls ballsack bird blue body blue feathers closed eyes crane bird erection feathers feet foreskin foreskin folds genitals gruiform hi res humanoid genitalia intact male male only mouth closed partially retracted foreskin penis perineum pteri artist pteri pteri sandhill crane scrotum smooth penis solo tail tail feathers talons testicles uncut 8859609