WeBS Alerts methods - References
Atkinson, P.W., Austin, G.E., Rehfisch, M.M., Baker, H., Cranswick, P., Kershaw, M., Robinson, J., Langston, R.H.W., Stroud, D.A., Van Turnhout, C. & Maclean, I.M.D. (2006). Identifying declines in waterbirds: The effects of missing data, population variability and count period on the interpretation of long-term survey data. Biological Conservation 130: 549-559.
Banks, A.N. and Austin, G.E. (2004). Statistical comparisons of waterbird site trends with regional and national trends for incorporation within the WeBS Alerts system. BTO research report 359. BTO Thetford, UK.
Stroud, D.A., Chambers, D., Cook, S., Buxton, N., Fraser, B., Clement, P., Lewis, P., McLean, I., Baker, H. & Whitehead, S. (2001). The UK SPA network: its scope and content. JNCC, Peterborough, UK.
Underhill, L.G. & Pr?s-Jones, R. (1994). Index numbers for waterbird populations. I. Review and methodology. J. Appl. Ecol., 31, 463-480.
WeBS Alerts citation
This report should be cited as: Cook, A.S.C.P., Barimore, C., Holt, C.A., Read, W.J. & Austin, G.E. (2013). Wetland Bird Survey Alerts 2009/2010: Changes in numbers of wintering waterbirds in the Constituent Countries of the United Kingdom, Special Protection Areas (SPAs) and Sites of Special Scientific Interest (SSSIs). BTO Research Report 641. BTO, Thetford. http://www.bto.org/webs-alerts
WeBS is a partnership between the British Trust for Ornithology, the Royal Society for the Protection of Birds and the Joint Nature Conservation Committee (the last on behalf of the statutory nature conservation bodies: Natural England, Natural Resources Wales and Scottish Natural Heritage and the Department of Agriculture, Environment and Rural Affairs, Northern Ireland) in association with the Wildfowl and Wetlands Trust. Email: webs [at] bto.org.