Interactive Bugs

The desert · Beetles

Pinacate beetle

Eleodes

A plain, jet-black, long-legged beetle that stands on its head when alarmed.

Size
2 to 3.5cm long
Look for it
All year round
Where
Deserts and dry grassland across western North America

My spotter's list

Walks after you, and stands on its head if you get close. Move your pointer and see.

When to look

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Stink beetle

Good to know

Six things about the stink beetle

Stand

A headstand

When threatened it stops, lowers its head and points its tail straight up in the air.

Spray

Then it sprays

If that does not work, it squirts a dark, foul-smelling liquid from its tail.

Walk

It cannot fly

Its wing cases are fused shut, which helps to keep water in. It walks everywhere.

Mouse

One mouse has the answer

The grasshopper mouse grabs the beetle, jams its tail into the sand and eats it from the head down.

Copy

Others pretend to be it

Harmless beetles copy the headstand, though they have nothing to spray.

Long

A long life for a beetle

Adults can live for several years.

The real thing

Photos of the stink beetle

Pinacate beetle, photo 1
Photo: EleodesThermopolis, CC BY 4.0, Wikimedia Commons
Pinacate beetle, photo 2
Photo: Katja Schulz, CC BY 4.0, Wikimedia Commons
Pinacate beetle, photo 3
Photo: EleodesThermopolis, CC BY-SA 4.0, Wikimedia Commons

Photos are from Wikimedia Commons, used under the free licences shown. They have been resized, and cropped where they appear in link previews.

Out and about

How to spot one

Look for a black beetle walking steadily across open ground, often in broad daylight. Its tracks in the sand look like a tiny zip.

Lend a hand

How to help

Give it room and it will carry on walking. It eats dead plants and seeds, and tidies the desert floor.

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