grass snake

noun4

1. •
   A nonvenomous snake of species Natrix natrix, native to Europe, with a yellow collar.
2. •
   A snake of either of the two species of genus Opheodrys of nonvenomous green snakes of North America.
3. •
   A smooth green snake (Opheodrys vernalis)
4. •
   A rough green snake (Opheodrys aestivus)