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Long-tailed Giant Ichneumon

Megarhyssa atrata

About Long-tailed Giant Ichneumon

A large dark-bodied ichneumonid wasp found in eastern North America. Females bore through bark to parasitize pigeon tremex horntail larvae.

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Did You Know?

Multiple females often congregate on the same dead tree, drilling simultaneously for hosts.

How to Identify Long-tailed Giant Ichneumon

Long-tailed Giant Ichneumon (Megarhyssa atrata) belongs to the order Hymenoptera, family Ichneumonidae. Adults typically measure 30-50 mm body, ovipositor up to 130 mm.

Long-tailed Giant Ichneumon Habitat

Long-tailed Giant Ichneumon is found in woodlands habitats, particularly across North America. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.

Long-tailed Giant Ichneumon Diet and Feeding

Long-tailed Giant Ichneumon feeds on wood and bark, often boring into timber. Wood-feeding insects contribute to the decomposition of dead trees and nutrient cycling in forest ecosystems.

Where Is Long-tailed Giant Ichneumon Found?

Long-tailed Giant Ichneumon can be found in North America, where it inhabits woodlands environments. Its distribution is influenced by climate, food availability, and habitat suitability.

Distribution Map

Where Long-tailed Giant Ichneumon can be found

Is Long-tailed Giant Ichneumon Dangerous?

Long-tailed Giant Ichneumon belongs to the order Hymenoptera, which includes many stinging insects. While not typically aggressive, it may sting if threatened or handled. Stings can cause pain and swelling, and in rare cases may trigger allergic reactions in sensitive individuals.

Long-tailed Giant Ichneumon Role in Nature

Long-tailed Giant Ichneumon is part of the food web as a primary consumer, feeding on plant material. It serves as an important food source for birds, bats, amphibians, and other insectivores, connecting plant energy to higher trophic levels.

Seasonal Activity

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Peak activity Moderate Low / dormant

Frequently Asked Questions About Long-tailed Giant Ichneumon

What does Long-tailed Giant Ichneumon look like?

The Long-tailed Giant Ichneumon typically measures 30-50 mm body, ovipositor up to 130 mm.

Where is Long-tailed Giant Ichneumon found?

The Long-tailed Giant Ichneumon is found in North America and typically inhabits woodlands environments.

What does Long-tailed Giant Ichneumon eat?

The Long-tailed Giant Ichneumon feeds on wood and bark, often boring into timber.

Is Long-tailed Giant Ichneumon dangerous to humans?

The Long-tailed Giant Ichneumon belongs to the order Hymenoptera, which includes stinging insects. While not typically aggressive, it may sting if threatened or handled.

What is an interesting fact about Long-tailed Giant Ichneumon?

Multiple females often congregate on the same dead tree, drilling simultaneously for hosts.

Cite This Page

APA:
InsectDiscover. (2026). Long-tailed Giant Ichneumon (Megarhyssa atrata). Retrieved from https://insectdiscover.com/insect/long-tailed-giant-ichneumon

MLA:
"Long-tailed Giant Ichneumon." InsectDiscover, https://insectdiscover.com/insect/long-tailed-giant-ichneumon.