engraving of black-spotted casque-headed tree frog

amphibian ancient animal antique blackspotted brazil casqueheaded clambering doodle drawing drawn ecology engraved engraving etching exotic fauna frog graphic hylidae illustration image ink isolated lakes line nature nigromaculatus old picture poison reptile retro sketch swamp temporaria terrarium themes toad toxic trachycephalus tree tropical vector vintage warts wild wildlife woodcut zoo zoology