A small influx of 6 Red Admirals was noted on the 1st and in warm sunshine on the 5th there was a substantial emergence of 60 Small Tortoiseshells, 34 Large Skippers, which is unprecedented in recent years, and 41 Marbled Whites. However, Meadow Browns were still not in large numbers and only 18 Common Blues were seen, though 2 Wall Browns were recorded. 35 Small Tortoiseshells were seen along the Delf Stream the next day. Marbled Whites continued to increase and 108 were recorded on the BMS transect on the 15th, with 72 'small' skippers, 35 Meadow Browns, 19 Small Heaths, 9 Small Tortoiseshells and the first 4 Gatekeepers of the year in a total of 255 butterflies, which was a huge improvement on recent weeks, if not exactly brilliant for the time of year.
A freshly emerged Green-veined White was seen on the 16th, a trek across Worth the next day was notable for a total of 54 Small Tortoiseshells and on New Downs on the 19th were at least 600 'small' skippers, the vast majority of which appeared to be Essex Skippers, nectaring on hoary mustard. The butterfly transect on the 22nd produced 313 butterflies, including 87 small skippers, 89 Marbled Whites, 59 Meadow Browns, 40 Gatekeepers and, perhaps slightly surprisingly, a Painted Lady on the shore and, continuing the theme of incoming migrants, 2 Clouded Yellows and a Painted Lady were seen on New Downs on the 31st.