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Sticker of Confused flour beetle
Bug card No. 0355 of 1,500

Confused flour beetle

Tribolium confusum
Eats: PlantsBeetlesHouses and farms6 legs

The confused flour beetle is a tiny reddish brown beetle that lives in flour and grain. It is one of the most common pests in kitchens, bakeries and food stores. It is so small it could sit on a grain of rice.

Lives in
All over the world, in homes, mills, bakeries and food stores
Length
3 to 6 mm (0.12 to 0.24 in)
Top speed
about 0.32 km/h (0.2 mph)
On foot, estimate
Can it hurt you?
Harmless
It does not bite or sting. It can spoil food, so if you find little beetles in the flour, tell a grown-up and do not eat it.
What does it eat?
It eats flour, broken grain, rice, dried fruit, nuts and beans. It cannot chew into whole, undamaged grains.
For real!Photo of Confused flour beetle
Picture by Sarefo. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Confused flour beetle 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 11 seconds

How big is Confused flour 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 cannot fly, unlike its close cousin, the red flour beetle.

2

You can tell it apart from the red flour beetle by its feelers, which slowly get thicker towards the tip.

3

Grown-up beetles and larvae sometimes eat the beetles' own eggs, which keeps the family from getting too big.

4

It first came from Africa and likes cooler places than the red flour beetle.

5

Flour with these beetles in it can smell bad and start to grow mould.

you asked

Most asked questions about Confused flour beetle

?How do flour beetles get into the kitchen?

They usually come in packets of flour or grain from the shop, then spread to other dry food in the cupboard.

?Can flour beetles fly?

The confused flour beetle cannot fly. Its cousin, the red flour beetle, can fly short distances.

?Are flour beetles harmful?

They do not bite, but they spoil food, and their smelly juices can irritate skin.

Myth buster

Myth: It is called confused because it walks around in a confused way.

Truth: No. It got its name because people kept confusing it with the red flour beetle. It walks perfectly normally.

For bug experts

Scientific name
Tribolium confusum
Group
Beetles
Family
Tenebrionidae
Classification
Insecta > Coleoptera > Tenebrionidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania

Where the facts come from

  1. Confused flour beetle (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 Sarefo. 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: Houses and farms