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Sticker of Rosemary beetle
Bug card No. 1172 of 1,500

Rosemary beetle

Chrysolina americana
Eats: PlantsBeetlesGardens and meadows6 legs

The rosemary beetle is a small, round beetle with shiny stripes of metallic green and purple. It looks like a tiny jewel sitting on the herbs in the garden. Its wings are short, so it mostly walks instead of flying.

Lives in
Southern Europe, North Africa and the Middle East, and now Britain too, in gardens
Length
5 to 8 mm (0.2 to 0.31 in)
Top speed
about 0.37 km/h (0.23 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. Gardeners just pick it off their rosemary by hand.
What does it eat?
It eats sweet-smelling herbs, most of all rosemary, and also lavender and thyme. The larvae nibble the same plants.
For real!Photo of Rosemary beetle
Picture by Hectonichus. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Rosemary beetle about 8 mm long (0.31 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 9.7 seconds

How big is Rosemary beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

It was first found living outdoors in Britain in 1994, and by 2002 it was all over London.

2

Its larvae grow during the winter months and the new beetles come out in spring.

3

Gardeners can shake the beetles off onto a sheet of paper to move them.

4

It can fly short distances, but it would rather walk.

you asked

Most asked questions about Rosemary beetle

?What does the rosemary beetle eat?

Rosemary most of all, and also lavender and thyme.

?Is the rosemary beetle harmful?

Not to people. Lots of them can damage herb plants, so gardeners pick them off.

?How big is the rosemary beetle?

It is about 5 to 8 millimetres long.

Myth buster

Myth: The rosemary beetle comes from America, because its name is americana.

Truth: No. Its name is a mistake. It comes from southern Europe, North Africa and the Middle East.

For bug experts

Scientific name
Chrysolina americana
Named by
Linnaeus, 1758
Group
Beetles
Family
Chrysomelidae
Classification
Insecta > Coleoptera > Chrysomelidae
Lives on
Europe, Africa, Asia

Where the facts come from

  1. Chrysolina americana (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 Hectonichus. CC BY-SA 3.0, 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: Gardens and meadows