A total of 269 butterflies on the weekly transect on the 1st was a welcome improvement on the season so far, even if 60% were Small/Essex Skippers and numbers of other species were moderate at best. Also of note were the first insects of second generation Brown Argus, Common Blue and Small Copper and encouraging numbers of Small Tortoiseshells, of which there were 23 on Worth on the 2nd. Huge numbers of Marbled Whites were emerging on the 5th, probably amounting to more than 600 across the Estate and adjacent parts of the golf course, and a notable 41 Small Tortoiseshells were evident on Worth on the 6th. As the hot weather continued, the 8th brought the first Gatekeepers and Peacocks of the summer and 437 butterflies were recorded on the weekly transect, including 197 Small/Essex Skippers and 143 Marbled Whites, though numbers of Meadow Browns remained very low. 451 were recorded on the transect walk on the 19th, including totals of 177 Small/Essex Skippers and 70 Marbled Whites, and there were at least 12 Commas in the Elms and 26 Red Admirals scattered about the Estate.

Numbers began to diminish more quickly than usual in the arid conditions that characterised the month and although 446 butterflies were recorded on the transect on the 28th, several grassland species had declined significantly and the most numerous species were Gatekeeper (119), Small White (79) and Common Blue (65). Elsewhere, 16 Commas were in the Elms and the first home-bred Painted Lady was seen nearby. A further decline was noted on the transect walk on the 30th, when 244 butterflies were recorded, the majority of which were Gatekeepers (75) and Common Blues (44).