rule 34 accipitrid accipitriform adelaherz anthro anus ass avian backsack balls bearded vulture bed bird digital drawing artwork digital media artwork feathers furniture gavin stien genitals glowing glowing eyes half erect hybrid looking at viewer looking back lying male muscular muscular anthro muscular male nude old world vulture on front penis penis backwards presenting presenting hindquarters raised tail shaded sofa solo spread legs spreading vulture 5384148