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The only real confusion species is the Common Hawker but that has yellow costa and the male would have full length but narrow antehumeral stripes. This specimen has short antehumeral stripes and dark costa.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 52.3087, -0.0351
OS grid ref: TL340696