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Sticker of Long-tailed giant ichneumon wasp
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Long-tailed giant ichneumon wasp

Megarhyssa macrurus
Name means: “from Greek words for long tail”

The long-tailed giant ichneumon wasp has a reddish-brown body with black and yellow-orange stripes. The female has an amazingly long, thread-like tail. With it, she can drill right into wood to lay an egg.

Lives in
Eastern United States and the far south of Canada near the Great Lakes
Length
5.1 cm (2 in)
Top speed
about 39 km/h (24 mph)
Flying, estimate
What does it eat?
Its baby lives on another insect larva hidden inside dead wood and slowly eats it up.
For real!Photo of Long-tailed giant ichneumon wasp
Picture by Seney Natural History Association. CC BY-SA 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Long-tailed giant ichneumon wasp about 5.1 cm long (2 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
as long as 8 grains of rice in a rowas long as 1.5 toy building bricks in a rowcould fly across a whole football pitch in 9.7 secondsmoves 210 times its own body length every second

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cool stuff

Fun facts

1

With her tail, the female can be more than 13 centimetres long.

2

The long tail is made of three threads. The middle one does the drilling, and the two outer ones protect it.

3

The female can find a wood-boring larva through the bark of a tree.

4

She lays her egg on the larva, and the baby wasp eats it within a couple of weeks.

5

Males are smaller and have no long tail at all.

you asked

Most asked questions about Long-tailed giant ichneumon wasp

?How big is the long-tailed giant ichneumon wasp?

Its body is up to about 5 centimetres long, and with the female's tail it can be over 13 centimetres.

?What does the long tail do?

It drills into dead wood so the wasp can lay an egg on a larva hiding inside.

For bug experts

Scientific name
Megarhyssa macrurus
Named by
Linnaeus, 1771
Group
Wasps and hornets
Family
Ichneumonidae
Classification
Insecta > Hymenoptera > Ichneumonidae
Lives on
North America
Also known as
Long-tailed giant ichneumonid wasp

Where the facts come from

  1. Megarhyssa macrurus (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 Seney Natural History Association. CC BY-SA 2.0, Wikimedia Commons. The round sticker of this bug is cut from the same 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.

More from the same group: Wasps and hornets

Also at home here: Forests and woods