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Honeybee radar tagging. Worker honeybee (Apis mellifera) being prepared for tagging with a radar transponder antenna. The bee (marked with a number) is gently trapped between some foam and a mesh. A tiny antenna will be adhered on to the bee's back and allow its flight path to be tracked in real time. The antenna does not need a battery and works by reflecting a component (harmonic) of an incoming radar signal. A portable radar tracking station is used to both transmit the signal and gather the information sent back. Photographed at the Rothamsted Research, UK. (KEYSTONE/SCIENCE PHOTO LIBRARY/LOUISE MURRAY/SCIENCE PHOTO LIBRARY)