FURVERT!

anthro anus avian backsack balls beak berdly bird blue_body blue_feathers bottomless butt clothed clothing colored deltarune eyewear feathers genitals glasses half-closed_eyes hi_res looking_at_viewer looking_back male narrowed_eyes open_mouth perineum portrait presenting presenting_hindquarters raised_tail shirt simple_background smile solo tail three-quarter_portrait tongue topwear undertale_(series)unknown_artist wings yellow_beak