Oak Marble Gall Wasp - Andricus kollari
Length 1.5 to 2mm. The male wasp is very dark brown to black on the head has a hunched thorax, with a black abdomen. The legs are yellowy brown and the antennae are a translucent yellow/brown colour. The female has a dark brown appearance overall.
[Note that parasitoids and inquilines may also emerge from galls]
There are many similar species of gall-wasp.
We recommend that the gall-causer is verified by an expert before submitting to NatureSpot - take good photographs, note the host gall and emergence date, and retain a specimen
Marble galls on oak
Adult females exit Oak Marble Galls from August to October.
Common throughout Britain.
Common
Graham Calow
Sapcote
14 September 2013
Marble Gall collected 30th Aug 2013
wasp emerged 14th Sep 2013
David Gould
Narborough Bog
01 July 2014
Graham Calow
Burbage Common
09 July 2013
hatched 9.7.2013 from marble gall
Graham Calow
Burbage Common and Woods
09 July 2013
hatched 9.7.2013 from marble gall
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Common names
- Marble Gall
- Species group:
- Bees, Wasps, Ants
- Kingdom:
- Animalia
- Order:
- Hymenoptera
- Family:
- Cynipidae
- Records on NatureSpot:
- 267
- First record:
- 24/05/2006 (Calow, Graham)
- Last record:
- 28/05/2025 (Pochin, Christine)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.