shield-tailed snakes

shieldtailed snakes animal behavior ecology asp beast bionomics cerastes crawl on belly creature creep creeper cringe crouch earth earthworm environment grovel herpetology inhabitants rainforest large leviathan ophidian reptile reptiles srilanka reptilian ringed serpent sri lanka swallower swallowing tropical forest wood truckle uropeltidae wheedle wild nature wildlife worm endemic