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Sticker of Banded alder borer
Bug card No. 0092 of 1,500

Banded alder borer

Rosalia funebris
Eats: WoodBeetlesForests and woods6 legs

The banded alder borer is a long, slim beetle in black and white. It has white bands across its dark back and very long feelers striped like a zebra. If you pick it up, it squeaks.

Lives in
Western North America, from Alaska to California and New Mexico, in woods
Length
3.8 cm (1.5 in)
Top speed
about 0.49 km/h (0.3 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It may squeak or hiss if you hold it, but that is just to scare you.
What does it eat?
Its larvae chew tunnels through the wood of fallen trees. Grown-up longhorn beetles like it usually feed on flowers.
For real!Photo of Banded alder borer
Picture by Jorasm. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Banded alder borer about 3.8 cm long (1.5 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 6 grains of rice in a rowcould run across a dinner table in 7.3 seconds

How big is Banded alder borer compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

When it is held or scared, it makes a noise like a squeaky running shoe or air hissing out of a bike tyre.

2

Nobody knows why, but it loves freshly painted buildings. Sometimes lots of them sit on the new paint.

3

The male's feelers are longer than its body, while the female's are shorter.

4

It lays its eggs in fallen trees, not living ones, so it does not hurt forests much.

you asked

Most asked questions about Banded alder borer

?Is the banded alder borer dangerous?

No. It is harmless, it just squeaks or hisses when handled.

?Why do banded alder borers land on painted houses?

Nobody knows for sure. Something about fresh paint attracts them.

?How big is the banded alder borer?

Its body can be up to about 4 centimetres long, not counting its long feelers.

For bug experts

Scientific name
Rosalia funebris
Group
Beetles
Family
Cerambycidae
Classification
Insecta > Coleoptera > Cerambycidae
Lives on
North America

Where the facts come from

  1. Rosalia funebris (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 Jorasm. 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: Beetles

Also at home here: Forests and woods