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Sticker of Rainbow leaf beetle
Bug card No. 1103 of 1,500

Rainbow leaf beetle

Chrysolina cerealis
Eats: PlantsBeetlesGardens and meadows6 legs

The rainbow leaf beetle is a small beetle that shines like a jewel. Its back is metallic green with blue and red stripes and a golden glow, just like a little rainbow. It lives in grassy and rocky places, often high up in the hills.

Lives in
Europe and Asia, from Wales and Norway to the far east of Russia
Length
0.6 to 1 cm (0.22 to 0.39 in)
Top speed
about 0.41 km/h (0.25 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. Just admire its colours and let it go on its way.
What does it eat?
Both the beetles and their larvae love wild thyme, and they like its flowers even more than the leaves.
For real!Photo of Rainbow leaf beetle
Picture by Janet Graham. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Rainbow leaf beetle about 1 cm long (0.39 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 fingernailas long as 1.5 grains of rice in a rowcould run across a dinner table in 8.8 seconds

How big is Rainbow leaf beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

In Britain it lives only on the slopes of Snowdon, a mountain in Wales, which is why it is called the Snowdon beetle.

2

It is endangered and protected by law in the United Kingdom.

3

The females are usually bigger than the males.

4

It lays its eggs on grasses in June.

5

You can see the grown-ups from April to September.

you asked

Most asked questions about Rainbow leaf beetle

?Why is it called the rainbow leaf beetle?

Because its shiny back has green, blue, red and gold colours, like a rainbow.

?What does the rainbow leaf beetle eat?

Mostly wild thyme, especially the flowers.

?Is the rainbow leaf beetle rare?

In Britain it is very rare and protected, but in other parts of Europe and Asia it is more common.

For bug experts

Scientific name
Chrysolina cerealis
Named by
Linnaeus, 1767
Group
Beetles
Family
Chrysomelidae
Classification
Insecta > Coleoptera > Chrysomelidae
Lives on
Europe, Asia
Also known as
Snowdon beetle

Where the facts come from

  1. Chrysolina cerealis (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 Janet Graham. CC BY 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 hello@bugwiki.app and we will fix it.

More from the same group: Beetles

Also at home here: Gardens and meadows