These beautiful small butterflies are on the wing and in small colonies on the moor here in Rosedale.  They are found on bilberry in a sunny spot with a bit of shelter from the breeze.  Males are very territorial and perch on a prominent branch awaiting passing females.  If disturbed they often return and settle on the same spot after a few frantic circuits.  However, they can be hard to spot as they are well camouflaged against the green leaves of bilberry.  Updale Natural History Recorder