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the damselfly ( suborder zygoptera ) is an insect in the order odonata . damselflies are similar to dragonflies , but the adults can be differentiated by the fact that the wings of most damselflies are held along , and parallel to , the body when at rest . the male blue tailed damselfly ( ischnura elegans ) is distinctive due to being mainly dark , with a single blue band close to the end of the abdomen . the normal form female colouration is sometimes replaced with lilac or orange . it is adapted to a wide range of habitat types and water conditions , including being the most pollution tolerant , so on occasions will be the only species present . it is a frequent coloniser of garden ponds . the flight period is from the end of may to september . nationally it is very common throughout lowland britain . ? |