Both Matthew and I started late at Knepp today, pursuing other quarry during the morning. After the excesses of the last few days it was surprisingly quiet. Although Matthew did better, I struggled to see 11 males, so left in a huff, to search out White-letter Hairstreaks. Amongst Matthew's larger tally was the first female of the year here, being escorted to bed.
There was nothing wrong with the weather. I suspect Matthew's theory is correct; that females emerged in good numbers this morning and that sallow-searching males active earlier in the day were by now filling their boots, in an orgy in the thickets.
The Knepp Safaris (www.kneppsafaris.co.uk) next weekend will be very different, providing plenty of opportunities to watch egg-laying females, assuming the weather is OK.