Common Spangle Gall Wasp

Neuroterus quercusbaccarum

The common spangle gall on the underside of leaves and the currant gall on the male catkins or occasionally the leaves, develop as chemically induced distortions on pedunculate oak, or sessile oak trees, caused by the cynipid wasp Neuroterus quercusbaccarum which has both agamic and bisexual generations. Source

Where it is now

In the last 8 weeks this insect was recorded 69 times across 7 areas (each area is a 5 degree square).

See the Common Spangle Gall Wasp on the live map

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

Download every area as CSV

Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.