Mating Damselflies are always fascinating to watch. On the Chesterfield canal we watched Common Blue and Blue-tailed Damselflies in their tandem flying mode, as well as in the ‘wheel formation’ when they are actually mating. The male Damselflies, typically more brightly coloured than the females, use their claspers, at the end of the abdomen, to clasp a special ‘shield’ on the females thorax, and the connection is strong enough for them to fly in this formation, as well as to land, rest and mate. Some species mate quickly and separate, while others remain linked for several hours to deter another Male from mating with the female. In fact, some males dig out the sperm of a previous Male In order to replace it with their own. You can watch this tandem flight and wheel along many slow-flowing streams and canals or pools. Conditions: A more normal summer day, with sun and cloud. Temperature: Max 23 Min 13 C.