Monday, 3 September 2012
Two fairly 'common' blue butterflies in the Peterborough area are the Chalkhill Blue and the Common Blue. The top 3 photos show the Chalkhill (male, female, male) and the bottom 4 show the Common (female, female, male, male). These blues have a distinct difference in appearance between the sexes, with the male being the 'blue' one, while the female tends to be brown, although the Common Blue female can sometimes have more blue in the upper wing as is shown in photo 5.
This year seems to have been a good one for Chalkhill Blues with hundreds of thousands of these 'flutters' being present at individual sites. At Barnack Hills and Holes, where these photos were taken, I counted up to 450 before losing count (not thousands, but certainly good numbers). A good news story in a year when butterfly numbers have been low, to say the least.