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alpha_channel ambiguous_gender anthro avian beak big_breasts big_nipples bird blue_body blue_feathers blue_nipples book border breasts carboncopy612 duo feathers female feral hi_res huge_breasts huge_nipples humor hyper hyper_breasts kurzgesagt kurzgesagt_bird looking_pleasured magnifying_glass medical_instrument narrowed_eyes nipples pink_body pink_feathers scientific_instrument solo_focus squint stethoscope thick_thighs tongue tongue_out transparent_border wings