FURVERT!

abs anthro anus areola avian back_muscles beak biceps big_breasts big_butt bioluminescence bird black_body black_feathers black_fur blue_areola blue_beak blue_body blue_eyes blue_feathers blue_fur blue_hair blue_nipples breasts butt claws clitoris digital_media_(artwork)duo eyebrows eyelashes feathered_wings feathers feet female front_view fur genitals glowing hair hi_res huge_butt kneeling long_hair looking_at_viewer martlet_(undertale_yellow)martlet_(zenith_form)monster muscular muscular_anthro muscular_arms muscular_female muscular_thighs navel neck_tuft nipples non-mammal_breasts nude on_one_knee open_mouth pecs perineum presenting presenting_hindquarters pubes rawslaw5 rear_view scuted_feet scutes short_hair size_difference smile square_crossover tail tail_feathers take_your_pick thick_thighs toe_claws tongue transformation tuft undertale undertale_(series)undertale_yellow vulva winged_arms wings yellow_beak yellow_eyes yellow_sclera