I headed for Heyshott Escarpment today in advance of the open day this coming Saturday. I was keen to take note of the Duke's progress and wasn't disappointed by what I found. A conservative estimate produced twenty Dukes and a single Duchess, and these were counted on only a small part of the eastern reserve. Hopefully numbers will continue to grow and we will see the Duke expanding his range into recently managed areas. In addition to His Grace, small numbers of Dingy and Grizzled Skipper were also seen, along with several Burnet Companion (Euclidia glyphica). I just hope the weather holds for our joint Sussex Butterfly Conservation / Murray Downland Trust event this coming Saturday.