Wasps build nests in a variety of sheltered areas, for example, roof spaces, wall cavities, garden sheds and even bird boxes. When you find regular flight
paths to and from the nest, this is an indication of the active presence of wasps. In the UK there are 2 main species of wasp, the solitary and the social wasps. Social wasps are the ones that we worry about the most because their population can reach anything from 5000 to 25,000 in a nest.