Rule 34 Dev - 4_toes anisodactyl anthro ass avian beak bird brown_fur brynia_(tabra) crouching equid equine erection falcon falconid feathered_wings feathers female fetlocks fur hair hooves horse knife male mammal mane neck_tuft nude penis peregrine_falcon rail sitting spank_marks straight tapering_penis threatening tiercel toes tuft white_hair wings yggiiggy|3665808080