noun
grass snake; ringed snake; water snake
Refers to the European grass snake (Natrix natrix), a non-venomous snake found in Europe. The Japanese name is a direct loan translation.
ヨーロッパヤマカガシは無毒のヘビです。
The European grass snake is a non-venomous snake.
イギリスの湿地でヨーロッパヤマカガシを見つけた。
I found a grass snake in a wetland in England.
ヤマカガシ is the Japanese tiger keelback (Rhabdophis tigrinus), a venomous snake native to East Asia. ヨーロッパヤマカガシ is a different species (Natrix natrix) found in Europe.
From ヨーロッパ (Europe) + ヤマカガシ (tiger keelback), a calque of the European grass snake's resemblance to the Japanese species.