Side view of the widely studied male semaphore fly (Poecilobothrus nobilitatus) resting on a leaf in a garden habitat. Seamphore flies are often found near ponds with the males using the pale markings on the end of the wings as part of elaborate courtship display. Semaphore flies will hunt prey on the water surface of the pond they inhabit feeding on other insects, crustaceans and worms Photographed in Somerset, UK, in June.