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1919 20th_century 5:4 ambiguous_gender ancient_art archibald_thorburn belly biological_illustration brown_body brown_fur dated digitigrade duo english_text feral fur grass hi_res mammal mustelid musteline nude outside plant public_domain quadruped signature species_name stoat technical_illustration text true_musteline weasel whiskers white_belly white_body white_fur zoological_illustration