The larvae of the gall wasp Andricus callidoma cause galls to form on Oak. The gall emerges from an unopened bud. The stalk is 3 to 5 mm long and can be much longer, the gall itself is approximately 2 x 4 mm with a pointed tip.
Where Oak (the host species) is present.
May to September.
Uncommon and little recorded in Britain.
Uncommon in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015