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Trends of common birds in Europe, 2013 update

This report presents an updated population trends and indices of 163 common European bird species for the time period 1980 - 2011 that have been produced by the Pan-European Common Bird Monitoring Scheme (PECBMS) in 2013.
Check also the updated common bird indicators for Europe, EU and their regions for the same time period.

Acknowledgements

Above all, we thank many skilled volunteer counters who have been collecting species count data year by year in the field.

Special thanks go to the data providers & organisations that are responsible for national data collection and analysis, and provide us with valuable advises and various support (listed alphabetically by countries and surnames):
Norbert Teufelbauer (Austria), Jean-Paul Jacob, Thierry Kinet, Jean-Yves Paquet, Christian Vansteenwegen, Anne Weiserbs (Belgium), Iordan Hristov (Bulgaria), Martin Hellicar, Derek Pomeroy, (Cyprus), Tomáą Telenský, Zdeněk Vermouzek (Czech Republic), Henning Heldbjerg, Michael Fink Jørgensen, Mathilde Lerche-Jørgensen (Denmark), Jaanus Elts, Andres Kuresoo, Renno Nellis, Hannes Pehlak (Estonia), Aleksi Lehikoinen, Risto A. Väisänen (Finland), Frédéric Jiguet (France), Martin Flade, Johannes Schwarz, Sven Trautmann (Germany), Theodoros Kominos, Aris Manolopoulos, Danae Portolou (Greece), Károly Nagy, Zsolt Nagy, Tibor Szép (Hungary), Dick Coombes, Olivia Crowe (Ireland), Gianpiero Calvi, Tommaso Campedelli, Lorenzo Fornasari, Patrizia Rossi (Italy), Ainārs Auniņą, Oskars Keiąs, Ieva Mārdega (Latvia), Gilles Biver (Luxembourg), Arjan Boele, Joost van Bruggen, Arend van Dijk, Calijn Plate, Wolf Teunissen, Chris van Turnhout, Jan-Willem Vergeer (Netherlands), Magne Husby, John Atle Kålås, Roald Vang (Norway), Tomasz Chodkiewicz, Przemysław Chylarecki, Grzegorz Neubauer, Bartlomiej Wozniak (Poland), Julieta Costa, Isabel Fagundes, Ana Leal, Domingos Leitão, Ricardo Martins, Ana Teresa Marques, Ana Meirinho, Hugo Sampaio (Portugal), Cristian Domşa, Ede Gábos, Zoltán D. Szabó (Romania), Jozef Ridzoň, Katarína Slabeyová, Ján Topercer (Slovakia), Luka Boľič, Jernej Figelj, Primoľ Kmecl (Slovenia), Marc Anton, Virginia Escandell, Sergi Herrando, Juan Carlos del Moral (Spain), Martin Green, Åke Lindström (Sweden), Hans Schmid, Martin Spiess (Switzerland), Dario Massimino, David G. Noble, Kate Risely (United Kingdom).

We are very grateful to Arco van Strien, Adriaan Gmelig Meyling and Thomas van der Meij (all from Statistics Netherlands) who contributed with final data analysis and computation procedure, and to Tomáą Telenský who helped very much with this web presentation.

We thank members of the PECBMS Steering and Technical Group - Richard D. Gregory (RSPB), Arco Van Strien (Statistics Netherlands), Ruud P.B. Foppen (SOVON), David G. Noble (BTO), Ian J. Burfield (Birdlife International), and Zdeněk Vermouzek (CSO) - for valuable comments and help with data collation and analysis.

We thank also to Norbert Schäffer and David W. Gibbons for general support of the project.

Pan-European Common Bird Monitoring Scheme is a joint initiative of the European Bird Census Council (EBCC) and BirdLife International. Since its beginning in 2002, the PECBMS project has been supported by the the Royal Society for the Protection of Birds (RSPB, the BirdLife International Partner in the UK). Since January 2006 the project has been funded by the European Commission as well.

     


Other important partners of the project are: Statistics Netherlands, Czech Society for Ornithology (CSO, BirdLife Partner in the Czech Republic), British Trust for Ornithology (BTO), Dutch Organisation for Field Ornithology (SOVON), and others.

Data

In 2013, reliable European index was produced on 163 species. This year, we were able to include 15 new species (Bubulcus ibis, Calcarius lapponicus, Clamator glandarius, Egretta garzetta, Grus grus, Haematopus ostralegus, Hirundo daurica, Larus ridibundus, Numenius arquata, Phasianus colchicus, Podiceps cristatus, Tachybaptus ruficollis, Tetrax tetrax, Tringa nebularia, and Turdus torquatus).

Altogether 27 countries provided their data for this update with two countries contributed for the first time (Romania and Luxembourg).

The complete list of countries contributing to the PECBMS in 2013: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Luxembourg, The Netherlands, Norway, Poland, Portugal, Romania, Slovenia, Slovakia, Spain, Sweden, Switzerland, United Kingdom.

The countries provided the data for different time periods, see Methods or check the ´List of countries´ at the individual species graphs.

New development and improvement in computation techniques allowed us to use data from multiple schemes within one country which is the case for data from Belgium, Cyprus, France, Germany, Latvia, Netherlands, Norway, Spain, Sweden. In addition, a new data from special monitoring schemes has been included in this update: Wetland Species Monitoring in Poland (covers period 2007 - 2011), and Rare Breeding Bird Survey in Germany (covers various periods from 1980).

Methods

Detailed description of computation steps and methods is available in special section Methods, in chapter 1. National species indices and trends and chapter 2. Supranational species indices and trends.

Species habitat classification for main habitat types (farmland, forest and other) is described in Methods, chapter 3, Box Species selection and classification.

Results

Updated European species indices, long-/short-term trends and slopes, and species habitat classification are summarized in the table (for explanations to the table see Explanations below the table).

To generate the graph of a species index, click the species name in the table. To generate graphs for several species at once, tick the check boxes at left side of species names and press ENTER or click Show graphs for selected species button below the table to confirm and proceed your selection. You can also draw graphs for all species at once (Select all) or quickly deselect your choice (Reset). The list of countries and time periods for which the countreis provided the data can be found at individual species graphs (List of countries). You can choose to order species trends by alphabet or by taxonomic classification, see by alphabet | by taxonomy buttons in the head of the table.

For comparison, check the previous version of species trends produced for the time period 1980 - 2010.

Note: We recommend cautious interpretation of year by year changes in the indicators values and readers should also pay attention to lists of species and countries. For any use of the results presented in this report, we strongly recommend to consult PECBMS coordination unit (EuroMonitoringbirdlife.cz).




Species scientific and common names as well as species taxonomic order follow the BirdLife Checklist, Version 4 (BirdLife International 2011).

Explanations

Species notes:
1) Data for Long-term Trend and Long-term Slope not available.
2) Data for Long-term Trend and Long-term Slope available over the period 1981-2011.
3) Data for Long-term Trend and Long-term Slope available over the period 1982-2011.
4) Data for Long-term Trend and Long-term Slope available over the period 1984-2011.
5) Data for Short-term Trend and Short-term Slope available over the period 1991-2011.
6) Data for Short-term Trend and Short-term Slope available over the period 1996-2011.
7) Data for Short-term Trend and Short-term Slope available over the period 1998-2011.
8) Data for Short-term Trend and Short-term Slope available over the period 1999-2011.
9) Data for Short-term Trend and Short-term Slope available over the period 2000-2011.

a) Trend1980(%) and Trend1990(%) - change (in %) in an index value between the first and the last year of a time period. Trend1980(%), i.e. long-term Trend, is computed over the period 1980-2011, Trend1990(%), i.e. short-term Trend, is computed over the period 1990-2011, if not noted otherwise in the Species notes.

b) Slope - multiplicative trend over a time period considered, reflects average percentage change per year. If the slope value is 1, there is no trend. If > 1, there is a positive trend, if < 1, trend is negative. For instance, 1.08 means 8 % increase per year, 0.93 means 7 % decline per year. Slope standard errors (SE) are in parenthesis. Long-term Slope is computed over the period 1980-2011, Short-term Slope is computed over the period 1990-2011, if not noted otherwise in the Species notes.

c) Habitat
for - forest
farm - farmland
oth - other

Contact

Project coordinator: Petr Voříąek, Czech Society for Ornithology, Na Bělidle 34, CZ-150 00 Prague 5, Czech Republic, phone +420 257212465, e-mail: EuroMonitoringbirdlife.cz.

Technical assistant: Jana ©korpilová, PECBMS, Czech Society for Ornithology, Na Bělidle 34, CZ-150 00 Prague 5, Czech Republic, phone +420 257212465, email: skorpilovabirdlife.cz.

Project manager: Richard Gregory, Head of Species Monitoring and Research, Royal Society for the Protection of Birds, The Lodge, Sandy, Bedfordshire, SG19 2DL, United Kingdom, e-mail: richard.gregoryrspb.org.uk

References

BirdLife International (2011). The BirdLife checklist of the birds of the world, with conservation status and taxonomic sources. Version 4.

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