At a time when the world has been focussed on events in North Africa and the Middle East, large numbers of predatory invaders have been silently invading Europe — and some have reached Britain. The invaders in question, though, are vagrant emperors.Last week two reached southwest England, following three other confirmed sightings last October. The latest sightings were a male photographed in Plymouth (Devon) on 15th April and a female who chose to rest on some washing in Penryn (Cornwall) the following day. Both sexes are brown, though the male has a bright blue segment at the base of the abdomen, next to the wings. In addition to 44 species of dragonfly and damselfly seen regularly in the UK, a further 10 species have occurred as vagrants, including vagrant emperor.
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