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This small darter is almost entirely black along its upper surface. The central black band on the thorax flank encloses three yellow spots.
There are yellow markings on the flanks of the thorax and abdomen. Abdominal segments 3 to 5 contract and expand to form a club-like appearance. As the males age the yellow markings darken, very old males being all black.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 51.3, -1.0
OS grid ref: SU7461