Bug Wiki
Sticker of Convoluted gall wasp
Bug card No. 1192 of 4,939

Convoluted gall wasp

Andricus confertus
Eats: PlantsWasps and hornetsForests and woods6 legs

The convoluted gall wasp is a tiny brown wasp from California. Its babies grow inside pink bumps on oak leaves. A bunch of these bumps together looks a bit like a little pink brain.

Lives in
California, on valley oak trees
Length
2.5 mm (0.1 in)
Top speed
about 8.7 km/h (5.4 mph)
Flying, estimate
What does it eat?
Its babies live inside a gall on an oak leaf and eat the inside of the gall.
For real!Photo of Convoluted gall wasp
Picture by Franco Folini from San Francisco, USA. CC BY-SA 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Convoluted gall wasp about 2.5 mm long (0.1 in)A grain of rice about 6 mm (0.24 in)
2.5 of them in a row are as long as one grain of ricecould fly across a whole football pitch in 43 secondsmoves 970 times its own body length every second

How big is Convoluted gall wasp compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The pink, brain shaped lump is really a cluster of many small galls stuck together.

2

The galls grow in summer on the underside of valley oak leaves, along the middle vein.

3

The grown-up wasps come out of the galls the next spring.

4

The adult wasps are only 2.5 millimetres long, smaller than a grain of rice.

you asked

Most asked questions about Convoluted gall wasp

?What is a gall?

A gall is a little lump that a plant grows around an insect baby. The baby lives and eats inside it.

For bug experts

Scientific name
Andricus confertus
Group
Wasps and hornets
Family
Cynipidae
Classification
Insecta > Hymenoptera > Cynipidae
Lives on
North America

Where the facts come from

  1. Andricus confertus (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 Franco Folini from San Francisco, USA. CC BY-SA 2.0, 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.

Bug Wiki honey jar For grown-ups: Bug Wiki is free, with no ads and no tracking. A small tip helps keep it online.Leave a tip

More from the same group: Wasps and hornets

Also at home here: Forests and woods

Honey jarfor grown-ups