Two-horned gall wasp
Dryocosmus dubiosus
The two-horned gall wasp is a tiny wasp that makes oak trees grow strange little bumps called galls. Its babies live inside these galls. The galls on the leaves look like they have a pair of bull's horns.
Lives in
California in North America, on coast live oaks and interior live oaks
What does it eat?
Its larvae live inside the galls on oak trees and feed on the plant from the inside.
How fast is it?
A kid running fast about 13 km/h (8.1 mph)
Two-horned gall wasp about 22 km/h (14 mph)
A grown-up on a bike about 25 km/h (16 mph)
A car driving in town about 50 km/h (31 mph)
cool stuff
Fun facts
1
It is very common in California.
2
The mother lays her eggs on the leaves and catkins of live oak trees.
3
The damage it does to oak leaves is often mixed up with damage from a tree fungus or from beetles.
you asked
Most asked questions about Two-horned gall wasp
?What is an oak gall?
A bump that an oak tree grows around the egg of a gall wasp. The baby wasp lives and eats inside it.
For bug experts
- Scientific name
- Dryocosmus dubiosus
- Group
- Wasps and hornets
- Family
- Cynipidae
- Classification
- Insecta > Hymenoptera > Cynipidae
- Lives on
- North America
Where the facts come from
- Dryocosmus dubiosus (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
- Picture by Cricket Raspet. CC BY 4.0, Wikimedia Commons. The sticker of this bug is drawn from this picture.
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