Grass Snake – Natrix natrix Grass Snake - Natrix natrix Grass Snake - Natrix natrix Grass Snake - Natrix natrix Grass Snake - Natrix natrix Grass Snake - Natrix natrix Grass Snake at Tophill Low on 10/03/2012. Grass Snake at Tophill Low on 10/03/2012. Grass Snake at Tophill Low on 10/03/2012. Grass Snake - Natrix natrix [A] Grass Snake - Natrix natrix [A]