1916 20th_century ancient_art biological_illustration bite climbing_tree dinosaur duo feathers feral fight flying forest gerhard_heilmann hi_res monochrome open_mouth plant prehistoric_species proavis reptile saurischian scalie technical_illustration theropod traditional_media_(artwork) tree
1916 20th_century ambiguous_gender ancient_art biological_illustration climbing_tree dinosaur duo feathers feral flying forest gerhard_heilmann monochrome plant prehistoric_species proavis reptile saurischian scalie solo_focus technical_illustration theropod traditional_media_(artwork) tree
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