Just a few days ago I was walking around the Heathland which forms part of the Woodland area that I regularly walk at this time of year in search of butterflies.
It was a bright sunny day and I was finding quite a few of the normal species that I would expect to find at this time. I was shooting a few images of a Small Tortoiseshell on a flower and my 'Spotter' (thats the Lady Wife) said that there was a different one very close by. I looked at it through the lens and just thought at the time it was a Brown Argus (Aricia agestis).
As it was in such good condition I decided to take a few shots of it.
Later when examining the images on my Mac, my attention was drawn to the white spots with black spots in the centre on each outer wing. Looking at the books I have on the subject I began to think this was a Northern Brown Argus (Aricia artaxerxes). However, the map locations of known territory, mainly Scotland and the Northern regions of England just didn't relate.
I contacted the County Recorder and was advised that it was indeed a Brown Argus (Aricia agestis), but of the known aberration snelleni. It has been recorded before at the location, but not often and rarely elsewhere in Eastern England.