The enchanting and beautiful Brimstone butterfly, one of the few UK butterflies which overwinter as adults, is out and about in the garden, woodland glades and meadows now so it is a really good time to look out for it. It feeds on our Primroses and Celandines, among other things. The male is a pale lemon with a green tinge, The female is a unique pale green (see photo’s). The caterpillars feed on Alder Buckthorn, a beautiful, small tree which feeds many insects. If you want one, Ashridge Nurseries have them either sold individually or in their wonderful wildlife hedge collection. Conditions: Cloudy, breezy, becoming sunny, after hot sunny spell. Temperature: Max 12- Min 6C.