I was at the stock pond at Bickershaw this afternoon when a light blue chaser
flew past. My obvious initial reaction was broad-bodied chaser, since they are
quite common at the site and are the only chaser here, with the exception of
four-spotted which is a very different dragonfly. It flew back and forth for a
minute or so, but I didn't pay it too much attention. However it looked a bit different, so finally I looked at it
through my binoculars and saw straight away that it had no antehumeral
stripes, a black tip to it's blue abdomen, and two dark marks on either side
of it's body. The abdomen was also more slender than I would have expected with broad-bodied chaser. Now I was interested because these are amongst the
identification features of scarce chaser, a species which doesn't occur
anywhere near Greater Manchester but which is known to be spreading north, no
doubt spurred on by the current run of heatwaves that the UK has been
experiencing.
For such a rare species I knew that I needed to get some photos, but unfortunately the dragonfly only
landed once and when it did it was front on and against the light. However,
there is enough in my photos to confirm the identification. The dark
triangular patch at the base of the hindwing marks it out as a chaser species, but unlike broad-bodied chaser which also has a dark patch at the base on the forewing, this dragonfly does not. Instead the black at the base of the forewing is
confined to and follows the major veins, a feature of scarce chaser. The eyes
have a blue hue.
The identification of this dragonfly has been confirmed by British Dragonfly Society expert Adrian Parr and accepted by Lancashire dragonfly recorder Steve White. Thanks to them both for
their comments.
This represents the first ever in Lancashire (which for the purposes of
dragonfly recording includes this part of Greater Manchester).

























