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Cuckoo wasp. Macrophotograph of a cuckoo wasp (Chrysis conica). Cuckoo wasps (family Chrysididae) are highly coloured and are named for their habit of laying eggs in the nests of other wasp species. Photographed by the USGS Bee Inventory and Monitoring Lab: an organisation dedicated to identifying, cataloguing and monitoring bees and other insect species. (KEYSTONE/SCIENCE PHOTO LIBRARY/US GEOLOGICAL SURVEY/SCIENCE PHOTO LIBRARY)