The Big ImageBoard (TBIB) - 2019 ambiguous gender anatomically correct animal genitalia butt claws cloaca extinct feathers feral full-length portrait genitals graphite (artwork) greyscale head crest hi res looking at viewer looking back membrane (anatomy) membranous wings monochrome nude pencil (artwork) portrait prehistoric species presenting presenting cloaca presenting hindquarters pterosaur quadruped raised tail rear view reptile scalie simple background small tail smile solo standing tail teeth traditional media (artwork) tropeognathus (species) white background wings zw3