FURVERT!

abdominal_bulge absurd_res accipitrid accipitriform anal animal_genitalia anthro avian balls beak bird blush bulge collar digitigrade eyes_closed felid feline flat_colors fondling_internal_bulge gavin_stien genitals hair hi_res knot knotting male male/male mammal nipples old_world_vulture sheath simple_background size_difference tail vesper_(vesper_art)vesper_art vulture