Norton's Giant Ichneumonid Wasp

Norton's Giant Ichneumonid Wasp

Megarhyssa nortoni

Daily sighting probability ~10% · With luck
at Sequoia and Kings Canyon National Parks

In 3 days ~30% in a week ~60%

16 Verified sightings at Sequoia and Kings Canyon National Parks From 2019 to 2026
27 In all 3 parks
June Best month
☀️ Diurnal When it's spotted

About the Norton's Giant Ichneumonid Wasp

Megarhyssa nortoni, also known as Norton's giant ichneumonid wasp or the western giant ichneumonid wasp, is a species of large ichneumon wasp. There are two described subspecies of Megarhyssa nortoni: M. nortoni nortoni (Cresson, 1864) (western US and southwestern Canada)

M. nortoni quebecensis (Provancher, 1873) (northeastern US and southeastern Canada) Megarhyssa nortoni is black, reddish brown, and yellow and has distinguishing round yellow spots down the side of the abdomen. Its legs are mostly yellow. Its wings are transparent, and the body is elongated with a length of 1.4 inches (36 mm). The female is notable for an ovipositor of 2 inches (51 mm) to 3 inches (76 mm) in length. The male is less colorful with no ovipositor.

This species is native to North America including parts of the United States and Canada. The subspecies M. nortoni nortoni has a western distribution from the Pacific Coast to Colorado while the subspecies M. nortoni quebecensis has an eastern distribution from the northeastern US and southeastern Canada. It is found in coniferous forests where horntail larvae are present... Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Sequoia and Kings Canyon National Parks 🇺🇸 United States
~10%
2 Glacier National Park 🇺🇸 United States
~10%
3 Great Bear Rainforest 🇨🇦 Canada
<5%

Cities Where Found

# City Country Daily sighting probability
1 Anchorage 🇺🇸 United States
~10%
2 Portland 🇺🇸 United States
<5%
3 Vancouver 🇨🇦 Canada
<5%

Before you go

What are the chances of seeing a Norton's Giant Ichneumonid Wasp in Sequoia and Kings Canyon National Parks?

With luck

About 10% of wildlife watchers report a Norton's Giant Ichneumonid Wasp sighting in Sequoia and Kings Canyon National Parks on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 51st most-seen of the 161 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.

When is the best time to see a Norton's Giant Ichneumonid Wasp in Sequoia and Kings Canyon National Parks?

June

In that month about 20% of wildlife watchers report a Norton's Giant Ichneumonid Wasp in Sequoia and Kings Canyon National Parks on a given day, against under 5% in September to May, the lowest months. That is one of Sequoia and Kings Canyon National Parks's driest months, with about 25 mm of rain against 190 mm in January.

What time of day is best to see a Norton's Giant Ichneumonid Wasp?

Between 8 and 11 am

Across all the parks we cover, that three-hour window holds the most Norton's Giant Ichneumonid Wasp sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.

Is Sequoia and Kings Canyon National Parks the best place to see a Norton's Giant Ichneumonid Wasp?

Yes

Of the 3 parks where we can rate Norton's Giant Ichneumonid Wasp sightings, Sequoia and Kings Canyon National Parks has the highest daily chance: about 10%. Next come Glacier National Park (United States, about 10%) and Great Bear Rainforest (Canada, under 5%).

Which relatives of the Norton's Giant Ichneumonid Wasp live in Sequoia and Kings Canyon National Parks?

Same order: Hymenoptera

The closest relatives of the Norton's Giant Ichneumonid Wasp that you can see in Sequoia and Kings Canyon National Parks (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Yellow-Faced Bumble Bee (about 40%), Western Black Carpenter Ant (about 30%) and Western Carpenter Bee (about 20%), with each one's daily chance of a sighting.

Where does the Norton's Giant Ichneumonid Wasp sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Norton's Giant Ichneumonid Wasp is recorded against all the insects logged in Sequoia and Kings Canyon National Parks (16 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.

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