An excellent day at Bison Hill with unbroken sunshine. In the sheltered parts mostly on or by the footpath leading to the cafe my friend, Bob, and I recorded 17 species: 40+ Brown Argus, 30+ Small Heath, 30+ Dingy Skipper, 20+ Brimstone, 20+ Common Blue, 10+ Green Hairstreak, 10+ Duke of Burgundy, 4 Peacock, 3 Grizzled Skipper, 3 Speckled Wood, 3 Red Admiral, 2 Orange Tip, 2 Small White, 1 Large White, 1 Small Tortoiseshell, 1 Holly Blue and 1 Small Copper. It has been several years since I've seen so many Brown Argus and Small Heath on a single visit anywhere. The Dukes are beginning to look faded now but many Brown Argus were fresh and quite a few of them were courting pairs including one swirling around over a flowerhead - photo below. We were however a little disappointed not to see more Grizzled Skipper - perhaps late in the season for it now.
Shame about one Green Hairstreak which has lost part of its wings on one side.
Just updated post - forgot to add Speckled Wood so 17 species in all