The tables of population change that appear on the species pages are species-based selections from a single unified table, with data newly calculated for this edition of the report. A number of additional selections from this table, by scheme and time-period, are presented in the Summary tables section. Using the table generator, you can interrogate the master table by data source or time-period, for all species or for your own selection of species, and choose how your extract will be sorted.
This edition of the Bird Trends report is the 13th in a series that began in 1997. Citations for previous editions are listed under Previous reports. Links are given to the full text of ten previous reports, which are still available on line.
The following links are available here to other sections of the report.
This report should be cited as: Baillie, S.R., Marchant, J.H., Leech, D.I., Renwick, A.R., Eglington, S.M., Joys, A.C., Noble, D.G., Barimore, C., Conway, G.J., Downie, I.S., Risely, K. & Robinson, R.A. (2012) BirdTrends 2011. BTO Research Report No. 609. BTO, Thetford. http://www.bto.org/birdtrends