Name: Oak Apple Gall
Scientific name: Biorhiza pallida
Nature Stars: 50
About: The oak apple gall is caused by a tiny gall wasp called Biorhiza pallida. It can be found on oak twigs.
How to identify: Unmistakeable, a large soft apple-like gall on oak twigs.
Fantastic fact: The wasp has a second generation which cause round galls on oak roots.
Photograph credit: Richard Carter