Identify It > Galls >
Galls are abnormal growths produced by plants and trees as a reaction to an invasion from a foreign body, such as an insect laying an egg on a bud or leaf.
The galls provide the larvae, which develop inside, with both food and protection from predators. The photos below show some which you might find.
There are over 1,500 different plant galls found in Britain. The study of plant galls is known as 'cecidology'. The links below show some which you might find.