Bug Wiki
Sticker of Greene's giant ichneumonid wasp
Bug card No. 2105 of 4,939

Greene's giant ichneumonid wasp

Megarhyssa greenei

Greene's giant ichneumonid wasp is a large, slim wasp. The female has a very long thin tail, a little longer than her body. She uses it to lay eggs deep inside tree trunks.

Lives in
United States and Canada
Top speed
about 22 km/h (14 mph)
Flying, estimate
What does it eat?
Its larva lives on the larva of a wood-boring sawfly hidden inside a tree and slowly eats it.
For real!Photo of Greene's giant ichneumonid wasp
Picture by Bruce Marlin. CC BY-SA 2.5, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

The female finds a sawfly larva hidden in the wood and lays her egg on it or close to it.

2

Its larva eats the sawfly larva and then turns into a pupa under the bark.

3

It comes out as a grown-up wasp about a year later.

4

It looks almost the same as a cousin whose tail is about twice as long as its body.

you asked

Most asked questions about Greene's giant ichneumonid wasp

?What is the long tail for?

The female uses it to put her eggs deep into wood, next to a sawfly larva.

For bug experts

Scientific name
Megarhyssa greenei
Group
Wasps and hornets
Family
Ichneumonidae
Classification
Insecta > Hymenoptera > Ichneumonidae
Lives on
North America

Where the facts come from

  1. Megarhyssa greenei (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Bruce Marlin. CC BY-SA 2.5, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

Bug Wiki honey jar For grown-ups: Bug Wiki is free, with no ads and no tracking. A small tip helps keep it online.Leave a tip

More from the same group: Wasps and hornets

Also at home here: Forests and woods

Honey jarfor grown-ups