not a venomous dark green snake grass-snake, with yellow spots on its head, swims on transparent water.

agile animal bite called camouflage crawl danger dangerous dark european fast fauna fear fearful flexible grass grasssnake green head herpetology hunting its medicine nasty natrix nature nimble nonpoisonous not pattern phobia poison predator quiet rare reptile reptilian ringed safe sand scales scary secretive serpent skin slide slippery snake snakes sometimes spots swim swims tail thin transparent venomous water wild wildlife wriggle yellow zoology