---
title: "Mountain Beaver"
description: "Aplodontia rufa — Mamíferos. The mountain beaver (Aplodontia rufa) or sewellel is a North American rodent."
canonical: https://animalchecklist.com/pt/animal/mountain-beaver
last_updated: 2026-09-20
---

# Mountain Beaver

> Aplodontia rufa — Mamíferos. The mountain beaver (Aplodontia rufa) or sewellel is a North American rodent.

- Scientific name: *Aplodontia rufa*
- Category: `mammals` (Mamíferos)
- Habitats: `forest` (Floresta), `mountains` (Montanhas)
- iNaturalist observations: 623
- Wikidata: [Q503813](https://www.wikidata.org/wiki/Q503813)
- iNaturalist taxon: [43736](https://www.inaturalist.org/taxa/43736)

## Names

- en: Mountain Beaver
- de: Stummelschwanzhörnchen
- es: Castor de montaña
- fr: Castor de montagne
- nl: Stompstaarteekhoorn
- pl: Sewel górski

## Countries with the most observations

US (400), CA (10)

## Summary

The mountain beaver (Aplodontia rufa) or sewellel is a North American rodent. It is the only living member of its genus, Aplodontia, and family, Aplodontiidae. It should not be confused with true North American and Eurasian beavers, to which it is not closely related; the mountain beaver is instead more closely related to squirrels. There are seven subspecies of mountain beaver, six of which are found in California and three of which are endemic to the state.

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

## Photo

![Mountain Beaver](https://animalchecklist.com/img/animals/mountain-beaver/medium.jpg)

Photo: Drew Meyer · CC0 · inaturalist — https://www.inaturalist.org/observations/233301299

## Machine access

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