beccasroberts's picture

Odd oak tree leaves

Observed: 31st July 2013 By: beccasrobertsbeccasroberts’s reputation in Invertebrates

Furry purple circles with white/yellow centres covering the undersides of most of the leaves on a small oak tree. (Apologies for poor photo quality.)

Species interactions

No interactions present.

Species with which Spangle gall (Neuroterus quercusbaccarum) interacts


Benny_wood's picture

It's hard to tell from the

It's hard to tell from the photo but from the description it sounds like spangle galls. From what I understand they are caused by one of several similar species of wasp.

darob57's picture

Neuroterus quercusbaccarum

Seems very likely to be these from photo and description. There are many of these common spangle galls around now.

A different generation of the same species produces currant galls on oak leaves and male catkins in spring.

I have a small oak in the garden which had currant galls in May and now has a good number of common spangle galls.


darob57's picture

Best moved

This should be moved to the invertebrates section now.