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Trends of common birds in Europe, 2016 update

This report presents an updated population trends and indices of 169 common European bird species for the time period 1980-2014 that have been produced by the Pan-European Common Bird Monitoring Scheme (PECBMS) in 2016. The species trends presented are for long time period (from 1980 onwards until 2014) and for last ten years (2005-2014).
Updated common bird indicators for Europe, EU and their regions for the same time period can be found in a special report.

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):
Johannes Hohenegger, Benjamin Seaman, Norbert Teufelbauer (Austria), Antoine Derouaux, Dido Gosse, Jean-Yves Paquet, Anne Weiserbs (Belgium), Iordan Hristov, Georgi Popgeorgiev (Bulgaria), Martin Hellicar, Derek Pomeroy (Cyprus), Zdeněk Vermouzek (Czech Republic), Nathia Brandtberg, Michael Fink Jørgensen, Jørn Dyhrberg Larsen, Timme Nyegaard (Denmark), Jaanus Elts, Andres Kuresoo, Renno Nellis, Hannes Pehlak (Estonia), Juha Honkala, Päivi Sirkiä, Risto A. Väisänen (Finland), Diane Gonzalez, Frédéric Jiguet (France), Martin Flade, Christoph Grüneberg, Johannes Schwarz, Sven Trautmann (Germany), Theodoros Kominos, Aris Manolopoulos, Danae Portolou (Greece), Zoltán Görögh, Károly Nagy, Zsolt Nagy, Tibor Szép (Hungary), Gianpiero Calvi, Tommaso Campedelli, Lorenzo Fornasari, Patrizia Rossi (Italy), Ainārs Auniņą, Oskars Keiąs, Ieva Mārdega (Latvia), Petras Kurlavičius, Renata Mackevičienė (Lithuania), Gilles Biver (Luxembourg), Arjan Boele, Joost van Bruggen, Kees Koffijberg, Tom van der Meij, Wolf Teunissen, Chris van Turnhout, Jan-Willem Vergeer (Netherlands), Magne Husby, John Atle Kålås, Roald Vang (Norway), Tomasz Chodkiewicz, Przemysław Chylarecki, Grzegorz Neubauer (Poland), Julieta Costa, Isabel Fagundes, Ana Leal, Domingos Leitão, Ricardo Martins, Ana Teresa Marques, Ana Meirinho, António Rosa, Hugo Sampaio (Portugal), Dick Coombes, Olivia Crowe (Republic of Ireland), Cristian Domşa, Ede Gábos, Zoltán D. Szabó (Romania), Jozef Ridzoň, Katarína Slabeyová, Ján Topercer (Slovakia), Jernej Figelj, Primoľ Kmecl (Slovenia), Marc Anton, Virginia Escandell, Emilio Escudero, Sergi Herrando, Juan Carlos del Moral (Spain), Martin Green, Åke Lindström (Sweden), Thomas Sattler, Hans Schmid, Martin Spiess (Switzerland), Sarah Harris, Dario Massimino, David G. Noble (United Kingdom).

We are very grateful to Arco van Strien, Adriaan Gmelig Meyling and Thomas van der Meij (all from Statistics Netherlands) who developed a tool for calculation of indices and trends and provided an assistance with a 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), Ruud P. B. Foppen (SOVON), David G. Noble (BTO), Iván Ramírez (Birdlife International), and Zdeněk Vermouzek (CSO) - for valuable comments and help with data collation and analysis.

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 2016, reliable European index was produced on 169 species. Altogether 28 countries provided their data for this update.
The complete list of countries contributing to the PECBMS in 2016: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Republic of Ireland, Romania, Slovenia, Slovakia, Spain, Sweden, Switzerland, United Kingdom.

The countries provided the data for different time periods, see Methods, chapter 2. Supranational species indices and trends 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, data from several special monitoring schemes are included as well: Wetland Species Monitoring in Poland (covers period 2007-2014), Rare Breeding Bird Survey in Germany (covers various periods from 1980), or Waterways Bird Survey (1974-2007) and Waterways Breeding Bird Survey (1998-2014) in United Kingdom.

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

The same as last year, we present long-term and ten-year trends and slopes. The Long-term Slope is calculated over the period 1980-2014 but starting years of this long time period vary from 1980 to 1998 (as specified in the Species notes below the table of trends). In parallel, the Long-term Trend represents a change (in %) in an index value between the first and the last year of this long time period. The Ten-year Slope is calculated over the period of last ten years, i.e. 2005-2014. Similarly, Ten-year Trend represents a change (in %) in an index value between the first and the last year of the period of last ten years.

Updated European species indices, long-term and ten-year trends and slopes, and species habitat classification are summarized in the table below. For explanations to the table see also the 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 1980-2013.

Indices and trends for 169 European bird species are now freely available for download in Excel sheets (Data Provision and Co-Authorship Policies applies).

We appreciate you help us to keep evidence of usage of our results. For this purpose, please fill in the simple registration form after you download the data files.

Download European species indices and trends till 2014

Please, note that the data is licensed under a Creative Commons license CC BY-NC 4.0 and is governed by applicable copyright law (Creative Commons Legal Code). Creative Commons. January 9, 2008. Retrieved February 22, 2010.

Note: We recommend cautious interpretation of year by year changes in the index values and readers should also pay attention to species legend. 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 8 (BirdLife International 2015).

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 1981-2014.
3) Data for Long-term Trend and Long-term Slope available over the period 1982-2014.
4) Data for Long-term Trend and Long-term Slope available over the period 1984-2014.
5) Data for Long-term Trend and Long-term Slope available over the period 1988-2014.
6) Data for Long-term Trend and Long-term Slope available over the period 1989-2014.
7) Data for Long-term Trend and Long-term Slope available over the period 1990-2014.
8) Data for Long-term Trend and Long-term Slope available over the period 1991-2014.
9) Data for Long-term Trend and Long-term Slope available over the period 1996-2014.
10) Data for Long-term Trend and Long-term Slope available over the period 1998-2014.
11) Data for Ten-year Trend and Ten-year Slope is not available. The given Slope and Trend is only for last eight years for the period 2006-2014.

a) Long-term Trend (%) and Ten-year Trend (%) - change (in %) in an index value between the first and the last year of a time period. Long-term Trend (%) is calculated over the period 1980-2014, unless specified differently in the Species notes below the table. Ten-year Trend (%) is calculated over the period of last ten years (2005-2014).

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 calculated over the period 1980-2014, unless specified differently in the Species notes below the table. Ten-year Slope is calculated over the period of last ten years (2005-2014).

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

Contact

Project coordinator: Petr Voříąek, e-mail: EuroMonitoringbirdlife.cz.

Technical assistant: Jana ©korpilová, e-mail: skorpilovabirdlife.cz.

Technical assistant (part time): Alena Klvaňová, e-mail: klvanovabirdlife.cz.

Research officer: Anna Gamero, e-mail: gamerobirdlife.cz.

All based at Czech Society for Ornithology, Na Bělidle 34, CZ-150 00 Prague 5, Czech Republic, phone +420 257 212 465.

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

Reference

BirdLife International (2015) The BirdLife checklist of the birds of the world: Version 8. Downloaded from http://www.birdlife.org/datazone/userfiles/file/Species/Taxonomy/BirdLife_Checklist_Version_80.zip [.xls zipped 1 MB].

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