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Sticker of Emerald ash borer
Bug card No. 0459 of 1,500

Emerald ash borer

Agrilus planipennis
Eats: PlantsBeetlesForests and woods6 legs

The emerald ash borer is a small, slim beetle that shines bright metallic green, like a jewel. When it opens its wings, its back is bright red underneath. It lives on ash trees, and its babies tunnel under the bark.

Lives in
North-eastern Asia, and now also North America and parts of eastern Europe, in ash trees
Length
8.5 mm (0.33 in)
Top speed
about 0.38 km/h (0.24 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It does not bite or sting, but it is very dangerous for ash trees.
What does it eat?
The grown-up beetles nibble ash leaves. The larvae eat the soft wood just under the bark of ash trees.
For real!Photo of Emerald ash borer
Picture by Pennsylvania Department of Conservation and Natural Resources - Forestry Archive. CC BY 3.0 us, via Wikimedia Commons.

How big is it?

How long is it?

Emerald ash borer about 8.5 mm long (0.33 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
small enough to sit on your fingernailcould run across a dinner table in 9.5 seconds

How big is Emerald ash borer compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

When it leaves the tree, it chews a hole shaped like the letter D through the bark.

2

Its larvae make long, wiggly tunnels under the bark.

3

In its home in Asia it does little harm, but in America and Europe it kills lots of ash trees.

4

It is spreading in Europe by up to 40 kilometres a year.

5

A mother beetle lays about 40 to 70 eggs in cracks of the bark.

you asked

Most asked questions about Emerald ash borer

?Why is the emerald ash borer a problem?

Outside Asia its larvae eat under the bark of ash trees and can kill them.

?How big is an emerald ash borer?

Only about 8.5 millimetres long and very thin.

?Is the emerald ash borer dangerous to people?

No. It is harmless to people. It only harms ash trees.

For bug experts

Scientific name
Agrilus planipennis
Named by
Fairmaire, 1888
Group
Beetles
Family
Buprestidae
Classification
Insecta > Coleoptera > Buprestidae
Lives on
Asia, North America, Europe
Also known as
EAB

Where the facts come from

  1. Emerald ash borer (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 Pennsylvania Department of Conservation and Natural Resources - Forestry Archive. CC BY 3.0 us, 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 hello@bugwiki.app and we will fix it.

More from the same group: Beetles

Also at home here: Forests and woods