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Sticker of Pear slug sawfly
Bug card No. 1035 of 1,500

Pear slug sawfly

Caliroa cerasi
Eats: PlantsWasps and hornetsGardens and meadows6 legs

The pear slug sawfly is a small black insect, a cousin of bees and wasps. Its babies look like tiny slimy slugs, because they cover themselves in green slime. They sit on the leaves of fruit trees and munch them down to a see-through skeleton.

Lives in
Almost all over the world, wherever cherry and pear trees grow
Top speed
about 22 km/h (14 mph)
Flying, estimate
What does it eat?
Its slimy larvae eat the leaves of cherry, pear, plum and hawthorn trees, leaving only the thin veins behind.
For real!Photo of Pear slug sawfly
Picture by Didier Descouens. CC BY-SA 4.0, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

The green slime makes the larvae taste horrible, so birds leave them alone.

2

A larva sheds its skin five to eight times before it is fully grown.

3

When it is big enough, the larva drops from the tree and turns into a pupa under the ground.

4

In New Zealand people let out a tiny wasp that hunts it, to protect their fruit trees.

5

Carl Linnaeus described it back in 1758.

you asked

Most asked questions about Pear slug sawfly

?Is the pear slug a real slug?

No. It is the larva of a sawfly. It only looks like a little slug because of its slime.

?What does the pear slug eat?

Leaves of cherry, pear, plum and hawthorn trees.

For bug experts

Scientific name
Caliroa cerasi
Named by
Linnaeus, 1758
Group
Wasps and hornets
Family
Tenthredinidae
Classification
Insecta > Hymenoptera > Tenthredinidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania
Also known as
Pear slug, Cherry slug

Where the facts come from

  1. Pear slug (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 Didier Descouens. CC BY-SA 4.0, 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: Gardens and meadows