9. References
1. Bowen, H. (2000) The Flora of Dorset, Pisces Publications
2. Joint Nature Conservation Committee web site, http://www.jncc.gov.uk
3. Dorset Environmental Records Centre web site, http://www.derc.org.uk
4. English Nature web site, http://www.english-nature.org.uk, Isle of Portland to Studland Cliffs Special Area of Conservation
5. Stace, C. (1997) New Flora of the British Isles, Cambridge University Press
6. Bowen, H. (1995) A brief note on the botany of Portland, in Portland Bird Observatory and Field Centre Report for 1995
7. Mansfield, J. and Mowday, P. (1999) The Fungi of Portland: an interim checklist, in Portland Bird Observatory and Field Centre Report for 1999
8. Butterfly Conservation (2004), web site http://www.butterflyconservation.co.uk
9. de Whalley, L. pers.comm. (Broadcroft Moths and Foodplants 1997 & 1998)
10. Cade, M. (1998) An annotated checklist of the moths and butterflies of Portland, in Portland Bird Observatory Reports for 1996, 1997 and 1998.
11. Waring, P. and Townsend, M. (2003), Field Guide to the Moths of Great Britain and Ireland, British Wildlife Publishing
12. Thomas, J. (1991) The Butterflies of Britain and Ireland, Dorling Kindersley
13. Levy, E. T. and Levy, D. A. (1998) Portland Hoverflies 1998, in Portland Bird Observatory Report for 1998.
14. Cade, M. (1995) The Dragonflies of Portland Bill, in Portland Bird Observatory Report for 1995.
15. Green, G. (1978) A study of aquatic invertebrates from Culverwell and the Reedy Ditch, in Portland Bird Observatory Report for 1978.
16. Joint Nature Conservation Committee (2004), UK Biodiversity Action Plan Web Site http://www.ukbap.org.uk
17. Fleming, J. M. (2001) Land Snails at Portland in 2001, in Portland Bird Observatory Report for 2001.
18. Fleming, J. M. (2001) Woodlice at Portland in 2001, in Portland Bird Observatory Report for 2001.
19. Pembroke, I.P. (2003) Spiders on Portland, in Portland Bird Observatory Report for 2003.
20. Cade, M. (2003) Portland Bird Observatory web site, http://www.portlandbirdobs.btinternet.co.uk/wildlife_diary_1to5_2003.htm
21. Cade, M. (2003) The Breeding Birds of the Isle of Portland, in Portland Bird Observatory Report for 2003.
22. Pritchard, M. (2003) Wild Mammals at Portland 1995 - 2003, in Portland Bird Observatory Report for 2003.