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FLEAM DYKE
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Fleam Dyke, Cambs. An ancient defensive barrier across the chalk from Balsham to the edge of the Fens at Fulbourn.
A public footpath runs along the top with access at all times from each end and from a lay-by on the A11.

The A11 road divides Fulbourn on the west side from Balsham to the east.

Guide by South Cambridgeshire District Council
David Barden's Fleam Dyke insect species list of May 2010
Friends of the Roman Road and Fleam Dyke

Small photograph of an information board Click on the image to enlarge
Notice board. June 2011
Small photograph of Fleam Dyke Click on the image to enlarge
17 April 2011
Small photograph of Fleam Dyke Click on the image to enlarge
Garlic-mustard. 21 April 2011
Small photograph of Fleam Dyke Click on the image to enlarge
21 April 2011
Small photograph of a Brimstone Click on the image to enlarge
Brimstone
Male. 6 April 2011
Small photograph of a Brimstone Click on the image to enlarge
Brimstone
Female. 19 April 2011
Small image of a Brimstone butterfly Click on the image to enlarge
Brimstone
Male. 5 May 2013
Small photograph of a Green-veined White Click on the image to enlarge
Green-veined White
Female. 22 April 2011
Small photograph of a Green-veined White Click on the image to enlarge
Green-veined White
Female. 22 April 2011
Small photograph of an Orange Tip Click on the image to enlarge
Orange Tip
Female. 17 April 2011
Small photograph of a Green Hairstreak Click on the image to enlarge
Green Hairstreak
21 April 2011
Small photograph of a Green Hairstreak Click on the image to enlarge
Green Hairstreak
21 April 2011
Small photograph of a Chalkhill Blue Click on the image to enlarge
Chalkhill Blue
Male. 23 July 2011
Small photograph of a Chalkhill Blue Click on the image to enlarge
Chalkhill Blue
Male. 23 July 2011
Chalkhill Blue Click on image to enlarge
Chalkhill Blue
Female. 26 July 2016
Small photograph of a Holly Blue Click on the image to enlarge
Holly Blue
Female. 6 April 2011
Small photograph of a Holly Blue Click on image to enlarge
Holly Blue
5 May 2013
Small photograph of a Red Admiral Click on the image to enlarge
Red Admiral
25 March 2012
Painted Lady Click on image to enlarge
Painted Lady
25 June 2013
Painted Lady Click on image to enlarge
Painted Lady
26 July 2016
Small photograph of a Small Tortoiseshell Click on the image to enlarge
Small Tortoiseshell
5 May 2013
Small photograph of a Dark Green Fritillary Click on the image to enlarge
Dark Green Fritillary
3 July 2011
Small photograph of a Dark Green Fritillary Click on the image to enlarge
Dark Green Fritillary
3 July 2011
Small photograph of a Dark Green Fritillary Click on the image to enlarge
Dark Green Fritillary
23 July 2011
Marbled White Click on image to enlarge
Fleam Dyke, Cambs.
26 July 2016

Personal sightings:

6 April 2011. In the wooded section towards Balsham, 1 Holly Blue.

17 April 2011. Walked from Balsham end. Numerous Brimstones and Orange Tips.

19 April 2011. Walked from Balsham. Numerous Brimstones and Orange Tips.

21 April 2011. Walked from Balsham. Numerous Brimstones, numerous Orange Tips, 3 Green Hairsteaks near Mutlow Hill, 1 Peacock.

3 July 2011. 5 Dark Green Fritillaries.

23 July 2011. Mid to late morning, bright intervals, windy. 5 Chalkhill Blues, 1 Dark Green Fritillary, few Gatekeepers, few Meadow Browns.

3 Sept 2011. Sunny, windy. c. 7 Chalkhill Blues, all very worn, one blue female, none appeared to be male. 1 Brimstone, 1 Red Admiral, 1 Speckled Wood, 1 Meadow Brown, 2 Small Heath.

11 March 2012. West side near Mutlow Hill, TL 544544 - 1 Brimstone. East side, near A11, TL 549540 - 1 Peacock.

22 March 2012. Between Dungate Farm and Bedford Gap, TL556533, 1 Brimstone.

25 March 2012. Near Mutlow Hill. TL5454. 1 Red Admiral.

29 March 2012. TL549541, 1 Peacock, 1 Brimstone. TL 547541, 1 Brimstone; TL545544, 2 Brimstones, 1 Red Admiral.

30 April 2012. Mutlow Hill to Railway cutting: TL547544, 1 Green veined White, 1 Brimstone, 2 Peacocks, 1 Red Admiral. TL547545, 2 Brimstones. A11 lay-by: TL550542, 1 Comma.

15 July 2012. A11 to Bedford Gap. Breezy, not very bright. 6 Meadow Browns, 15 Ringlets.

12 Aug 2012. TL5553. Between A11 and Bedford Gap. 2 Small Whites, 4 Brimstones, c.180 Chalk Hill Blues, 4 Peacocks, 4 Gatekeepers, 5 Meadow Browns, 1 Ringlet. Note: counted just before 10.00 am, as it got warmer there seemed to be about twice as many CHBs walking back but not recounted.

13 Sept 2012. East side. 6 Small Whites, 2 Chalkhill Blues (1M, 1F), 1 Red Admiral, 2 Small Heaths.

13 Sept 2012. Fleam Dyke, West side. TL 5454. 2 Small Whites, 1 Brimstone, 1 Green-veined White, 2 Red Admirals, 1 Small Tortoiseshell, 2 Commas, 1 Speckled Wood, 1 Small Heath.

14 April 2013. TL5454. Sunny but windy. West side between the A11 and the railway cutting, 4 Brimstones. East side near the road, 1 Brimstone.

20 April 2013. Bright, breezy, cool. East side. Balsham end to Bedford Gap, 1 Brimstone, 1 Peacock. Bedford Gap to A11, 3 Brimstones, 2 Small Tortoiseshells, 2 Peacocks. West side from A11 to the railway cutting. 1 Green-veined White, 6 Brimstones, 3 Peacocks.

5 May 2013. Sunny, light breeze. East side. Balsham end to Bedford Gap, 3 Brimstones, 1 Orange-tip. Bedford Gap to A11, 9 Brimstones, 2 Green-veined Whites, 1 Orange-tip, 1 Small Tortoiseshell, 1 Peacock. West side, A11 to the railway cutting, 14 Brimstones, 2 Green-veined Whites, 4 Orange-tips, 4 Holly Blues, 1 Small Tortoiseshell, 1 Peacock, 1 Comma.

25 June 2013. Bright intervals, breezy. 6 Brimstones, 1 Painted Lady, 6 Small Heaths.

26 July 2016. East side. A11 to Bedford Gap. Breezy. Many smallish Skippers, 2 Brimstones, very many Chalkhill Blues, 3 pairs in cop., 1 Marbled White, many Gatekeepers, some Meadow Browns and Ringlets.

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30 Mar 2013