Common bird monitoring scheme in Bulgaria
Citation
Hristov I, Stoychev S, Spasov S, Popgeorgiev G (2024). Common bird monitoring scheme in Bulgaria. Version 1.4. Bulgarian Society for the Protection of Birds. Occurrence dataset https://doi.org/10.15468/t6scvp accessed via GBIF.org on 2024-08-18.Description
The Common bird monitoring scheme is developed by the Bulgarian Society for the Protection of Birds. The data are used to produce trends of common birds in the country which are published in nine yearly reports. These reports contain not only individual species trends but also habitat indices like the Farmland bird index and Forest Bird Index. The first year of publication is 2007 which contains the first assessment of the species trends for the period 2005-2007.
Data are submitted annually to the Pan European Common Bird Monitoring Scheme administration to produce European wide indices and species trends. These trends and indices are delivered to the European Commission and Eurostat for decision-making.
The current data set presents data for each individual survey plot visited in the period mentioned below.
Sampling Description
Study Extent
The survey methodology description includes two sections: selection of survey plots and field surveying. The selection of survey plots is semi-stratified. In each 10 km UTM square in the country are randomly selected 5 squares 1x1 km each. From these squares, volunteers can choose a 1x1 km square depending upon its proximity to their homes.Sampling
The field survey methodology includes selection of two transects oriented N-S or E-W depending on the terrain. Transects are recommended to be 500m apart from each other and 250 m from the sides of the square. If the terrain does not allow, it is possible to use data from only one transect to include the square into the surveys. The sampling effort includes two transects across the square, 1 km long each. If the terrain does not allow surveying of 2 transects, the data from survey plot can be considered even with only one transect. Each square has one person responsible for it. Once the transects are selected, the observer should conduct two visits each year in approximately the same time. First (early) visit is in the period April 15th to May 15th and second (late) visit in the period May 16th – June 15th. Mountainous survey plots may have later dates for visits.Method steps
- During survey work, observers record each individual bird. The distance to the birds is entered in four categories 1 (0-25m), 2 (25-100m), 3 (>100 m), F – for birds flying over. Other than bird data, observers are asked to collect data for the beginning and the end of the survey. The database calculates the number of visits per year of each survey plot in relation to the date of visit.
- The data collected in the period 2004 - 2016, are georeferenced in the centroid of the MGRS UTM 1 km. Data after 2016 are collected with a mobile app for Android developed specifically for the purpose (SmartBirds Pro).
Taxonomic Coverages
-
Avesrank: kingdom
Geographic Coverages
Bibliographic Citations
Contacts
Iordan Hristovoriginator
position: Monitoring officer
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: iordan.hristov@bspb.org
Stoycho Stoychev
originator
position: Conservation director
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: stoycho.stoychev@bspb.org
Svetoslav Spasov
originator
position: Project manager
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: svetoslav.spasov@bspb.org
Georgi Popgeorgiev
originator
position: DB manager
Bulgarian Society for the Protection of Birds
Plovdiv
Plovdiv
4000
Plovdiv
BG
Telephone: +35829799500
email: georgi.popgeorgiev@gmail.com
homepage: https://bspb.org/
userId: https://orcid.org/0000-0002-7625-8898
Georgi Popgeorgiev
metadata author
position: DB manager
Bulgarian Society for the Protection of Birds
Plovdiv
Plovdiv
4000
Plovdiv
BG
Telephone: +35829799500
email: georgi.popgeorgiev@gmail.com
homepage: https://bspb.org/
userId: https://orcid.org/0000-0002-7625-8898
Iordan Hristov
editor
position: Monitoring officer
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: iordan.hristov@bspb.org
Iordan Hristov
administrative point of contact
position: Monitoring officer
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: iordan.hristov@bspb.org
Stoycho Stoychev
administrative point of contact
position: Conservation director
Bulgarian Society for the Protection of Birds
Yavorov quarter, Bl. 71, Entr. 4, app. 1
Sofia
1111
BG
Telephone: +35829799500
email: stoycho.stoychev@bspb.org
Georgi Popgeorgiev
administrative point of contact
position: DB manager
Bulgarian Society for the Protection of Birds
Plovdiv
Plovdiv
4000
Plovdiv
BG
Telephone: +35829799500
email: georgi.popgeorgiev@gmail.com
homepage: https://bspb.org/
userId: https://orcid.org/0000-0002-7625-8898