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Hello In our garden to one side we have a deciduous hedge which has already turned brown and looks unhealthy. We are unsure if it may have been disturbed while building an extension a year ago or if it has to do with thousands of little thin (a little fatter than lead in a pencil) black and white caterpillar like bugs about 1-2cm in length . The rest of the garden is walled and there are hundreds /thousands of these crawling around the walls. What are these creature and should we get rid of them? Are they likely to attack a hedge that has been there for years.? Would appreciate any help
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These sound like the caterpillars of the small ermine moth, which occurs as large colonies on hawthorn and bird cherry, making extensive white webs. They soon pupate and disappear and may not be seen again, or might occur again, but the trees recover well.
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