Avian Population Estimates Panel
The Avian Population Estimates Panel (APEP) consists of a group of experts from key organisations that are involved in producing population estimates for bird species in the United Kingdom. APEP review bird population estimates periodically.
The latest review (2019) was published in British Birds as:
Frost, T.M., G.E. Austin, R.D. Hearn, S.G. McAvoy, A.E. Robinson, D.A. Stroud, I.D. Woodward & S.R. Wotton. 2019. Population estimates of wintering waterbirds in Great Britain. British Birds 112: 130-145. Link
Musgrove, A.J., N.J. Aebischer, M.A. Eaton, R.D. Hearn, S.E. Newson, D.G. Noble, M. Parsons, K. Risely & D.A. Stroud. 2013. Population estimates of birds in Great Britain and the United Kingdom. British Birds 106: 64–100. Download
Musgrove, A.J., G.E. Austin, R.D. Hearn, C.A. Holt, D.A. Stroud & S.R. Wotton. 2011. Overwinter population estimates of British waterbirds. British Birds 104: 364-397. Download
Baker, H., D.A. Stroud, N.J. Aebischer, P.A. Cranswick, R.D. Gregory, C.A. McSorley, D.G. Noble & M.M. Rehfisch. 2006. Population estimates of birds in Great Britain and the United Kingdom. British Birds 99: 25–44. Download
Stone, B.H., J. Sears, P.A. Cranswick, R.D. Gregory, D.W. Gibbons, M.M. Rehfisch, N.J. Aebischer & J.B. Reid. 1997. Population estimates of birds in Britain and in the United Kingdom. British Birds 90: 1–22.