Bug Wiki
Sticker of Spongy oak apple gall wasp
Bug card No. 4098 of 4,939

Spongy oak apple gall wasp

Amphibolips confluenta
Eats: PlantsWasps and hornetsForests and woods6 legs

The spongy oak apple gall wasp is a tiny wasp that lives on oak trees. It makes the oak grow a round ball, called a gall, that looks like a little apple. Its young grow up safely inside the spongy ball.

Lives in
Eastern North America, from Ontario and Quebec through much of the eastern United States
Top speed
about 22 km/h (14 mph)
Flying, estimate
What does it eat?
Its young feed inside the gall, on the oak tree's own tissue.
For real!Photo of Spongy oak apple gall wasp
Picture by Rhododendrites. CC BY-SA 4.0, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

The ball it makes the oak grow is called an oak apple, and it is soft and spongy inside.

2

It uses many kinds of oak, like red oak, scarlet oak and black oak.

3

Gall wasps are so small that most people only ever notice the galls, not the wasps.

you asked

Most asked questions about Spongy oak apple gall wasp

?What is an oak apple?

A round ball on an oak tree that grows around the young of a gall wasp. It is not a real fruit.

For bug experts

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

Where the facts come from

  1. Amphibolips confluenta (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 Rhododendrites. CC BY-SA 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.

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