Clouded Yellow Colias croceus
The Clouded Yellow is an unpredictable annual migrant to Britain arriving from southern Europe in spring and dispersing northwards, occasionally occurring in huge numbers about once every decade. It may be expected in many habitats where there is an abundance of nectar sources.
It has rich deep-yellow wings with solid black borders, which, on the female, are dotted with yellow spots. There is a pale female form helice. It almost always rests and feeds with its wings closed.
The first arrivals are usually seen in May and June, with further immigrations possible between July and September. Numbers are supplemented by locally bred butterflies as it has a very rapid breeding cycle. It may be recorded until October.
Food plants are clovers, Lucerne, and Common Bird's-foot-trefoil.
Clouded Yellow Distribution Map 2006
|Recorded squares:||47 in 2006
10 in 2005
|Earliest record:||15 June 2006
Pleasley Colliery, Derbys
30 July 2006
|Latest record:||2 November 2006
Forest Recreation Ground
Clouded Yellow Distribution Map 2007
|Recorded squares:||15 in 2007
56 in 2006
|Earliest record:||20 May
Sheffield Road, Barlborough
22 August; Paul Townsend; Whitting Valley
12 September; R A Frost; Shirebrook Colliery
15 September; Richard Taylor; Carr Vale NR, Derbys
|Latest record:||7 October
Avenue Coking Plant
Clouded Yellow Distribution Map 2008
|Recorded squares:||1 in 2008
15 in 2007
|Only record:||24 June
Friargate Station, Derby
Clouded Yellow - © Christine Maughan