![Oak gall by Vaughn Matthews](/sites/default/files/styles/scaled_default/public/2020-06/wildlifetrusts_54597622784.jpg?itok=1QsfWi74)
Oak gall by Vaughn Matthews
1. There are about 9,000 species of wasp in the UK. Only nine of these form the large, social nests we usually think of – the others are solitary. Many of the 9,000 species are parasites of insects or plants, such as gall wasps which lay eggs on a plant, causing it to form a gall to protect the larva.