---
title: "Eastern Black-tailed Rattlesnake"
description: "Crotalus ornatus — Gady. The black-tailed rattlesnake (Crotalus molossus) is a venomous pit viper species found in the southwestern United States and Mexico."
canonical: https://animalchecklist.com/pl/animal/eastern-black-tailed-rattlesnake
last_updated: 2026-09-20
---

# Eastern Black-tailed Rattlesnake

> Crotalus ornatus — Gady. The black-tailed rattlesnake (Crotalus molossus) is a venomous pit viper species found in the southwestern United States and Mexico.

- Scientific name: *Crotalus ornatus*
- Category: `reptiles` (Gady)
- Habitats: `desert` (Pustynia)
- iNaturalist observations: 2340
- Wikidata: [Q3003833](https://www.wikidata.org/wiki/Q3003833)
- iNaturalist taxon: [503374](https://www.inaturalist.org/taxa/503374)

## Names

- en: Eastern Black-tailed Rattlesnake
- de: Östliche Schwarzschwanz-Klapperschlange
- es: Cascabel de cola negra ornamental

## Countries with the most observations

US (2042), MX (119)

## Summary

The black-tailed rattlesnake (Crotalus molossus) is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here.

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

## Photo

![Eastern Black-tailed Rattlesnake](https://animalchecklist.com/img/animals/eastern-black-tailed-rattlesnake/medium.jpg)

Photo: Cecelia Alexander · CC0 · inaturalist — https://www.inaturalist.org/observations/9256410

## Machine access

`GET https://animalchecklist.com/api/v1/animals/eastern-black-tailed-rattlesnake?lang=pl` — see [openapi.json](https://animalchecklist.com/openapi.json).