---
title: "Mountain Water Snake"
description: "Trimerodytes percarinatus — Rettili. Trimerodytes percarinatus, commonly known as the eastern water snake, olive keelback, olive annulate keelback or Chinese keelback water snake, is a species of snake in the subfamily Natricinae."
canonical: https://animalchecklist.com/it/animal/mountain-water-snake
last_updated: 2026-09-20
---

# Mountain Water Snake

> Trimerodytes percarinatus — Rettili. Trimerodytes percarinatus, commonly known as the eastern water snake, olive keelback, olive annulate keelback or Chinese keelback water snake, is a species of snake in the subfamily Natricinae.

- Scientific name: *Trimerodytes percarinatus*
- Category: `reptiles` (Rettili)
- Habitats: `freshwater` (Laghi e fiumi)
- iNaturalist observations: 1168
- iNaturalist taxon: [1119882](https://www.inaturalist.org/taxa/1119882)

## Names

- en: Mountain Water Snake
- de: Olivfarbene Kielrückennatter

## Countries with the most observations

CN (469), TW (356), HK (269), VN (21)

## Summary

Trimerodytes percarinatus, commonly known as the eastern water snake, olive keelback, olive annulate keelback or Chinese keelback water snake, is a species of snake in the subfamily Natricinae.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Trimerodytes_percarinatus

## Photo

![Mountain Water Snake](https://animalchecklist.com/img/animals/mountain-water-snake/medium.jpg)

Photo: syy55016 · CC0 · inaturalist — https://www.inaturalist.org/observations/392354116

## Machine access

`GET https://animalchecklist.com/api/v1/animals/mountain-water-snake?lang=it` — see [openapi.json](https://animalchecklist.com/openapi.json).