Brimstone
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Great Yeldham
29 Mar 2014
Brimstone
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Great Yeldham
Male. 3 April 2011
Brimstone
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Fleam Dyke, Cambs.
Male. 6 April 2011
Brimstone
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Fleam Dyke, Cambs.
Female. 19 April 2011
Brimstone
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Fleam Dyke
Male. 5 May 2013
Brimstone
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Roseland House
31 May 2014
Brimstone
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Roseland House
31 May 2014
Brimstone
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Roseland House
25 June 2014
Brimstone
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Fleam Dyke
Female. 26 June 2011
Brimstone
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Great Yeldham
Female. 19 July 2010
Brimstone
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Great Yeldham
Female. 16 Aug 2009
Brimstone
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Aston Rowant
26 Aug 2012
Brimstone
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Great Yeldham
24 Sept 2013

The Brimstone, Gonepteryx rhamni

Brimstones are quite common especially in spring, the almost white females contasting with the darker yellow males.
Fleam Dyke (from Balsham to Fulbourn) is a good spot to see Brimstones. On a hot still day (like 19 April 2011) up to 20 or so can be seen along a short stretch on the Fulbourn side of the A11.

Except when hibernating they may be seen on the wing at any time of year with a gap in mid July before the fresh new hatchings appear.

They have just one brood per year, the adults hatching in August, and hibernating as adults before taking to flight again in the warmer days of spring. They breed in early summer, laying their eggs on Buckthorn or Alder Buckthorn.

In 2012 at Roseland House 9 small whips of Common Buckthorn were planted in 3 groups in the paddock. They were planted in the open well away from the hedges. In 2014 eggs were laid in late June and up to 20 caterpillars seen from June 4th to July 18th.

Internal links: Home . Main gallery . Butterfly list . Aston Rowant . Fleam Dyke . Totternhoe Quarry

External links to the Brimstone pages at: British Butterflies by Steven Cheshire . UK Butterflies by Peter Eeles
Search menu at Cockayne database for forms and aberrations

Adults in flight: MOST SEEN on ANY ONE DAY in early, mid and late month thirds.
Brimstone sightings at Roseland House, Great Yeldham.
March April May June July August Sept
2011 0 0 1 1 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2012 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
2013 0 0 0 1 1 1 1 1 0 1 0 0 0 0 0 0 1 1 0 0 1
2014 2 1 2 1 1 1 0 1 1 1 0 0 0 0 0 1 0 0 0 0 0

Adults in flight: AVERAGE SIGHTINGS PER COUNTING DAY in early, mid and late month thirds.
Brimstone sightings at Roseland House, Great Yeldham.         All species
March April May June July August Sept
2011 0 0 0.7 0.4 0.3 0.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2012 0 0 0.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0 0
2013 0 0 0 1.0 0.3 0.2 0.2 0.2 0 0.1 0 0 0 0 0 0 0.1 0.1 0 0 0.6
2014 1.0 0.1 0.5 0.3 0.1 0.3 0 0.4 0.1 0.6 0 0 0 0 0 0.3 0 0 0 0 0

Weather notes:
2011. July - early August very wet.
2012. April - mid July very wet. August to mid September dry.
2013. Winter wet, March and early April, very cold. The rest of the spring was mostly cold. July, mostly very warm. August, warm.
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20 May 2013