Numbers on the BMS transect continued to be good at the start of the month, with 243 butterflies on the 2nd, including 66 each of Common Blue and Small White, 12 Brown Argus and a resurgence in numbers of Small Heath, of which 52 were recorded. At least 30 Speckled Woods were scattered about in the usual areas and Clouded Yellows were seen at the Observatory and on Willow Farm. 5 Clouded Yellows were seen the next day (3 on New Downs and 2 in the Restharrow area) and at least 50 Speckled Woods were present on the 5th. However, an abrupt change to autumnal conditions saw temperatures fall by 16 degrees in 3 days, so 103 butterflies on the transect on the 10th, after heavy rain the previous day, was probably better than might have been expected. Most were Small White (32) and Small Heaths (30), with 16 Common Blues and 7 Small Coppers the best of the rest.
Just to underline the extent of the recovery in numbers in the second half of this topsy-turvy season the penultimate BMS transect walk of the season produced 79 butterflies, bringing this year's total to within a whisker of 2007, as well as being the best of the last three years. Most were Small Whites (21) and, notably, Small Coppers (also 21), with 16 Small Heaths and 7 Speckled Woods, which have been in particularly good numbers in the second half of the year. The final walk of the season brought the total past the 2007 mark and as things settled down in the last week of the month a couple of late-ish Clouded Yellows and large numbers of Small Coppers were evident.