FURVERT!

against_surface anthro anus avian balls beak bird black_body black_feathers blush bodily_fluids butt corvid corvus_(genus)crow feathers foreskin genital_fluids genitals hi_res humanoid_genitalia humanoid_penis looking_at_viewer looking_down looking_down_at_viewer low-angle_view male on_glass oscine passerine penis platinumlust precum sitting solo tail tail_feathers worm's-eye_view