the.com/grass snake

means A non-venomous Eurasian snake, typically olive-green with a yellow collar, that lives near water and is famous for its dramatic death-feigning when threatened.

from A plain compound of "grass" and "snake," both deeply rooted Old English words — "græs" for the green stuff it slithers through, and "snaca," related to a wide family of Germanic words for crawling, creeping things (think of the verb "to sneak"). The name simply describes where you'd find it: a snake in the grass, long before that phrase became a metaphor for treachery. Its old scientific name, Natrix, comes from Latin for a water-snake, a nod to its fondness for ponds and rivers.