The Spangle Gall is caused by a tiny gall wasp, Neuropterus quercusbaccarum, and can be found on the underside of oak leaves in early autumn. It is common and widespread, and a single leaf can host up to 100 galls, each containing a single larva. The galls fall to the ground and can be seen around oak trees during autumn; the larvae continue to develop through the winter, and emerging as adults in April.
How to identify
The Spangle Gall is a brown, disc-shaped gall found on the undersides of oak leaves. There are several similar, disc-shaped galls, however, that also grow on oak trees.
Where to find it
When to find it
How can people help
The Wildlife Trusts manage many nature reserves for the benefit of all kinds of wildlife, from bugs to butterflies, fish to Foxes. But these precious sites are under threat from development, intensive agricultural practices and climate change. You can help by supporting your local Trust and becoming a member; you'll find out about exciting wildlife happenings, events on your doorstep and volunteering opportunities, and be helping local wildlife along the way.