This morning at least three Green Hairstreaks were seen around the north end of the Deep Pit, laying eggs on the Bird’s-foot Trefoil. A Brimstone was also seen egg-laying on the Alder Buckthorn by the Pumphouse. Three to four Hobbies were seen hawking insects over the site. (One seen stooping briefly at the Hobbies looked suspiciously like a Merlin, but was very distant.) PS.