---
title: "Longhorn Crazy Ant"
description: "Paratrechina longicornis — Insects & spiders. The longhorn crazy ant (Paratrechina longicornis), also known as the black crazy ant, is a species of small Formicine ant."
canonical: https://animalchecklist.com/animal/longhorn-crazy-ant
last_updated: 2026-09-20
---

# Longhorn Crazy Ant

> Paratrechina longicornis — Insects & spiders. The longhorn crazy ant (Paratrechina longicornis), also known as the black crazy ant, is a species of small Formicine ant.

- Scientific name: *Paratrechina longicornis*
- Category: `insects` (Insects & spiders)
- Habitats: `urban` (Towns & gardens)
- iNaturalist observations: 15215
- Wikidata: [Q1089549](https://www.wikidata.org/wiki/Q1089549)
- iNaturalist taxon: [69388](https://www.inaturalist.org/taxa/69388)

## Names

- en: Longhorn Crazy Ant
- es: Hormiga africana loca de antenas largas
- fr: Fourmi folle noire

## Countries with the most observations

US (2654), MX (1723), IN (1474), BR (605), HK (542), ES (379), TW (289), TH (262), AU (251), PR (223), MY (209), ID (198)

## Summary

The longhorn crazy ant (Paratrechina longicornis), also known as the black crazy ant, is a species of small Formicine ant. These ants are commonly called "crazy ants" because instead of following straight lines, they dash around erratically. They have a broad distribution, including much of the tropics and subtropics, and are also found in buildings in more temperate regions, making them one of the most widespread ant species in the world. This species, as well as all others in the ant subfamily Formicinae, cannot sting. However, this species can fire/shoot a formic acid spray from its abdomen when under attack by…

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

## Photo

![Longhorn Crazy Ant](https://animalchecklist.com/img/animals/longhorn-crazy-ant/medium.jpg)

Photo: Evelyn Lazzaretti 🏳️‍⚧️ · CC0 · inaturalist — https://www.inaturalist.org/observations/230152904

## Machine access

`GET https://animalchecklist.com/api/v1/animals/longhorn-crazy-ant?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).