---
title: "Large Milkweed Bug"
description: "Oncopeltus fasciatus — Insetos e aranhas. Oncopeltus fasciatus, known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae."
canonical: https://animalchecklist.com/pt/animal/large-milkweed-bug
last_updated: 2026-09-20
---

# Large Milkweed Bug

> Oncopeltus fasciatus — Insetos e aranhas. Oncopeltus fasciatus, known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae.

- Scientific name: *Oncopeltus fasciatus*
- Category: `insects` (Insetos e aranhas)
- Habitats: `grassland` (Campos e prados), `farm` (Quinta)
- iNaturalist observations: 92705
- Wikidata: [Q5140654](https://www.wikidata.org/wiki/Q5140654)
- iNaturalist taxon: [55556](https://www.inaturalist.org/taxa/55556)

## Names

- en: Large Milkweed Bug
- es: Gran chinche del algodoncillo
- fr: Grande punaise de l'Asclépiade

## Countries with the most observations

US (77021), CA (2456), MX (938), GT (18), DO (17), PR (16), KN (11), CR (10), CU (8), JM (8), KY (8), HT (4)

## Summary

Oncopeltus fasciatus, known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae. It is distributed throughout North America, from Central America through Mexico and the Caribbean to southern areas in Canada. Costa Rica is the southern limit of its range. It inhabits disturbed areas, roadsides, and open pastures. Due to this widespread geographic distribution, the large milkweed bug exhibits varying life history trade-offs depending on the population location, including differences in wing length and other traits based on location.

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

## Photo

![Large Milkweed Bug](https://animalchecklist.com/img/animals/large-milkweed-bug/medium.jpg)

Photo: mefisher · CC0 · inaturalist — https://www.inaturalist.org/observations/59180717

## Machine access

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