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Brimstone
The Brimstone, the original "butter-coloured fly", is a favourite harbinger of Spring in the New Forest, where it often emerges on sunny days in March, and can be seen for most of the Spring. The second brood, usually not as numerous, emerges in July, and continues into September. A strong flyer, with the female much paler than the male, it always perches with wings firmly closed, showing only the green under wing. In 2021, a poor Spring contributed to a decline in numbers, and in 2022, the lack of any September sightings was unusual.
total seen
maxima
first seen
last seen
2021
2020
2019
2018
2017
2016
2015
... the stats box
50 10 13th April 8th August
39 9 19th April 27th Sept
95 15 4th April 10th Sept
100 22 1st April 13th Sept
96 20 6th April 2nd Sept
66 10 5th April 22nd Sept
36 10 12th April 7th Sept
63 13 6th April 28th August