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2017 3:4 abs accipitrid accipitriform alphamoonlight anthro avian beak biceps biped bird black_body black_fur butt claws clothed clothing feathers forearms fur grey_body grey_fur gryphon hand_behind_head hi_res looking_at_viewer male muscular muscular_anthro muscular_male mythological_avian mythological_creature mythology navel pecs purple_eyes scaled_forearms scales simple_background sitting solo topless underwear white_background wings