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Gall  Spangle Galls

Spangle galls - Photo  Copyright 2003 G. Bradley
Photo: G. Bradley

UK Safari Tip:
To help you identify the most frequently found galls there's a fully illustrated fold out chart in the Nature Shop - click here

Spangle galls are normally seen in late summer or early autumn on the underside of oak leaves. They are caused by the female gall wasp Neuroterus quercusbaccarum.

A single leaf can have up to 100 of these galls, each containing a single developing larvae.

Fallen Spangle Galls - Photo  Copyright 2004 G. Bradley
Photo: G. Bradley

In early autumn the ground below some oak trees can be littered with fallen spangle galls. The larvae continue to develop inside, and in spring the females emerge to lay their eggs on the oak catkins.

Current Galls - Photo  Copyright 2004 G. Bradley
Photo: G. Bradley

These produce 'Currant galls' (shown above), which hang like redcurrants. In summer the adult sexual generation will emerge and lay their eggs on the undersides of the oak leaves.

Track Down More Info

UK Safari Galls Section
UK Safari Plants and Trees Section
UK Safari Creepy-Crawlies Section

  2006 G. Bradley. All Rights Reserved