rule 34 accipitriform anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro avian beak bird black body black feathers black pupils black text blush bodily fluids captainzepto cere anatomy cum cum inside cutaway dipstick feathers duo facial markings feathers from behind position genital fluids genitals green eyes grey beak grey scutes head markings hi res internal lying male male penetrating markings mask marking multicolored body multicolored feathers on front open beak open mouth penetration penis scutes secretary bird sex speech bubble text white body white feathers yellow eyes 3814731