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Sticker of Nodding thistle receptacle weevil
Bug card No. 3007 of 4,939

Nodding thistle receptacle weevil

Rhinocyllus conicus
Eats: PlantsBeetlesGardens and meadows6 legs

The nodding thistle receptacle weevil is a small black weevil with a short snout. It is covered in a coat of mottled black and yellowish hairs. Its larvae live inside thistle flower heads and eat the seeds.

Lives in
Europe, Asia and North Africa, and brought by people to the United States
Length
6 mm (0.24 in)
Top speed
about 0.1 km/h (0.06 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting you.
What does it eat?
The larvae eat the flowers and young seeds inside thistle heads. The adults nibble the leaves.
For real!Photo of Nodding thistle receptacle weevil
Picture by Landcare Research New Zealand Ltd. CC BY 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Nodding thistle receptacle weevil about 6 mm long (0.24 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 36 seconds

How big is Nodding thistle receptacle weevil compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

A female lays over 100 eggs on thistle flower heads and covers them with chewed plant mush to hide them.

2

The larva builds a hard little room inside the flower head and turns into a weevil there.

3

People brought it to the United States in 1969 to stop weedy thistles from spreading.

4

Later it also started eating native thistles, so in many places people are no longer allowed to release it.

you asked

Most asked questions about Nodding thistle receptacle weevil

?What does the nodding thistle receptacle weevil eat?

Thistles. The larvae eat the seeds inside the flower heads.

?Why were these weevils brought to America?

To stop weedy thistles, because the larvae destroy the seeds.

For bug experts

Scientific name
Rhinocyllus conicus
Group
Beetles
Family
Curculionidae
Classification
Insecta > Coleoptera > Curculionidae
Lives on
Europe, Asia, Africa, North America

Where the facts come from

  1. Rhinocyllus conicus (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 Landcare Research New Zealand Ltd. CC BY 4.0, Wikimedia Commons. The sticker of this bug is drawn from this 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.

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