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abs accipitrid accipitriform anthro avian bdsm beak biceps bird black_body black_feathers black_sclera body_pattern bondage bottomwear bound braided_hair chain_necklace chest_markings chest_tuft clothed clothing eagle eyebrow_piercing facial_piercing feather_hair feathers feet grey_background grey_beak grey_hands grey_talons hair hands_behind_back hands_tied hands_tied_behind_back harpy_eagle hi_res jewelry klaus_bloodstein male markings multicolored_body muscular muscular_anthro muscular_male necklace orange_eyes pants pecs photo_reference piercing pseudo_hair reference_image restraints reven_(klaus_bloodstein)rope rope_bondage simple_background solo stare tail tail_feathers talon_hands talons toes topless tuft white_body white_feathers