Monitoring of spotted eagles in Estonia in 1994–2014: Stability of the lesser spotted eagle (Aquila pomarina) and decline of the greater spotted eagle (A. clanga)

Abel U 2014: Väike-konnakotka kaitse tegevuskava projekt aastateks 2014-2018 [The project of the National action plan for the lesser spotted eagle in Estonia, 2014-2018]. Kotkaklubi, Tartu, 55. [In Estonian] Search in Google Scholar

Bergmanis U, Petri¡š A, Cirulis V, Granats J, Opermanis O & Soms A 2015: Population size and population dynamics of the lesser spotted eagle (Aquila pomarina) in Latvia over the last decade. Slovak Raptor Journal 9: 45-54. DOI: 10.1515/srj-2015-0003.10.1515/srj-2015-0003Search in Google Scholar

BirdLife International 2004: Birds in Europe: population estimates, trends and conservation status. Bird- Life Conservation Series No. 12. BirdLife International, Cambridge, 374.Search in Google Scholar

BirdLife International 2015: Species factsheets: Clanga clanga, Clanga pomarina. Retrieved February 11, 2015, from http://www.birdlife.org.Search in Google Scholar

Elts J, Leito A, Leivits A, Luigujõe L, Mägi E, Nellis R, Nellis R, Ots M & Pehlak H 2013: Eesti lindude staatus, pesitsusaegne ja talvine arvukus 2008-2012 [Status and numbers of Estonian birds in 2008-2012]. Hirundo, 26: 80-112. [In Estonian with English summary] Search in Google Scholar

Forsman D 1999: The raptors of Europe and the Middle East: A Handbook of field identification. Poyser, London, 589.Search in Google Scholar

Hardey J, Crick H, Wernham C, Riley H, Etheridge B & Thompson D 2009: Raptors: A field guide for surveys and monitoring. Second edition. Scottish National Heritage, Edinburgh, 370.Search in Google Scholar

Langgemach T, Scheller W & Weber M 2005: The lesser spotted eagle Aquila pomarina in Germany - recent data on population, population trend, reproduction and threats, 153-159. In: Mizera T & Meyburg B-U (eds): International meeting on spotted eagles (Aquila clanga, A. pomarina and A. hastata) - Research and conservation. Biebrza National Park, Osowiec, Poznan, Berlin, 268.Search in Google Scholar

Langgemach T & Böhner J 2011: Modelling the population dynamics of the lesser spotted eagle Aquila pomarina in Brandenburg: What are the effects of years with extremely low reproduction? Vogelwelt 132: 93-100.Search in Google Scholar

Lelov E 1991: Breeding raptors and owls at Halinga, SW Estonia, in 1978-1989. Ornis Fennica 68: l19-122.Search in Google Scholar

Lõhmus A 1994: Kulliliste ja kakuliste seire tänapäeva Eestis [Monitoring of raptors and owls in Estonia]. Hirundo 1994 (2): 31-45. [In Estonian with English summary] Lõhmus A 1998: Suur- ja väike-konnakotka arvukusest Eestis [The numbers of the greater and lesser spotted eagle in Estonia]. Hirundo 11: 24-34. [In Estonian with English summary] Search in Google Scholar

Lõhmus A 2004: Eesti röövlinnuseire 1999-2003: kanakulli kadu ja hiiretsüklite kellavärk [Monitoring of raptors and owls in Estonia, 1999-2003: decline of the Goshawk and the clockwork of vole-cycles]. Hirundo 17: 3-18. [In Estonian with English summary] Search in Google Scholar

Lõhmus A & Väli Ü 2001: Numbers and population dynamics of the lesser spotted eagle Aquila pomarina in Estonia. Acta Ornithoecologica 4 (2): 291-295.Search in Google Scholar

Lõhmus A & Väli Ü 2001: Interbreeding of the greater Aquila clanga and lesser spotted eagle A. pomarina. Acta Ornithoecologica 4 (2): 377-384.Search in Google Scholar

Lõhmus A & Väli Ü 2005: Habitat use by the vulnerable greater spotted eagle Aquila clanga, interbreeding with the lesser spotted eagle Aquila pomarina in Estonia. Oryx 39: 170-177. DOI: 10.1017/ S0030605305000414.10.1017/S0030605305000414Search in Google Scholar

Maciorowski G Lontkowski J & Mizera T 2014. The spotted eagle - vanishing bird of the marshes. Unigraf, Bydgoszcz-Poznan, 303.Search in Google Scholar

Maciorowski G & Mirski P 2014. Habitat alteration enables hybridisation between lesser spotted and greater spotted eagles in north-east Poland. Bird Conservation International, 24: 152-161.10.1017/S0959270913000348Search in Google Scholar

Meyburg B-U, Belka T, Danko S, Wójciak J, Heise G, Blohm T & Matthes H 2005: Geschlechtsreife, Ansiedlungsentfernung, Alter und Todesursachen beim Schreiadler Aquila pomarina. Limicola 19: 153-179.Search in Google Scholar

Meyburg B-U, Haraszthy L, Strazds M & Schäffer N 2001: European species action plan for the lesser spotted eagle. In: Schäffer N & Gallo-Orsi U (eds). European Union action plans for eight priority bird species. European Commission, Luxembourg, 247.Search in Google Scholar

Nurmla A, Nellis R & Väli Ü 2014: Suur-konnakotka kaitse tegevuskava projekt aastateks 2014-2018 [The project of the National action plan for the greater spotted eagle in Estonia, 2014-2018]. Kotkaklubi, Tartu, 31. [In Estonian] Search in Google Scholar

Pannekoek J & Van Strien A 2005: TRIM 3 Manual. (TRends and Indices for Monitoring data). Statistics Netherlands, Voorburg, 57.Search in Google Scholar

Pchelintsev VG 2006: Distribution and abundance of some raptor species in the Leningrad region, 120-124. In: Koskimies P & Lapshin NV (eds), Status of raptor populations in eastern Fennoscandia. Proceedings of the Workshop 8-10 November 2005, Kostomuksha, Karelia, Russia. Karelian Research Centre of the Russian Academy of Science, Petrozavodosk, 184.Search in Google Scholar

Randla T 1976: Eesti röövlinnud [Estonian Birds of Prey]. Valgus, Tallinn, total number of pages. [In Estonian with English summary] Search in Google Scholar

Tuule E, Tuule A & Lõhmus A 2011: Fifty-year dynamics in a temperate raptor assemblage. Estonian Journal of Ecology 60: 132-142. DOI: 10.3176/eco.2011.2.04.10.3176/eco.2011.2.04Search in Google Scholar

Treinys R, Drobelis E, Šablevicius B, Naruševicius V, Petraška A 2007: Changes in the abundance of the lesser spotted eagle (Aquila pomarina) breeding population in Lithuania in 1980-2006. Acta Zoologica Lituanica 17: 64-69.10.1080/13921657.2007.10512817Search in Google Scholar

Saurola P 1986: The raptor grid: an attempt to monitor Finnish raptors and owls. Vår Fågelvärld Suppl. 11: 187-190.Search in Google Scholar

Statistics Estonia 2015. Statistical database. Retrieved February 2, 2015, from http://www.stat.ee/ee.Search in Google Scholar

Väli Ü 2010: Successful breeding of a ten-year-old hybrid spotted eagle Aquila clanga x A. pomarina retaining immature plumage characters. Ardea 98: 235-241. DOI: 10.5253/078.098.0214.10.5253/078.098.0214Search in Google Scholar

Väli Ü 2011: Numbers and hybridisation of spotted eagles in Estonia as revealed by country-wide field observations and genetic analysis. Estonian Journal of Ecology 60: 143-154. DOI: 10.3176/ eco.2011.2.05.10.3176/eco.2011.2.05Search in Google Scholar

Väli Ü 2012: Factors limiting reproductive performance and nestling sex ratio in the lesser spotted eagle Aquila pomarina at the northern limit of its distribution range: the impact of weather and prey abundance. Acta Ornithologica 47: 157-168. DOI: 10.3161/000164512X662269.10.3161/000164512X662269Search in Google Scholar

Väli Ü & Lõhmus A 2000: The greater spotted eagle and its conservation in Estonia. Hirundo Supplementum 6. Eesti Ornitoloogiaühing, Tartu, 50.Search in Google Scholar

Väli Ü & Lõhmus A 2004: Nestling characteristics and identification of the lesser spotted eagle Aquila pomarina, greater spotted eagle A. clanga, and their hybrids. Journal of Ornithology 145: 256-263. DOI 10.1007/s10336-004-0028-7.10.1007/s10336-004-0028-7Search in Google Scholar

Väli Ü, Lõhmus A & Sellis U 2005: The greater spotted eagle in Estonia: numbers, distribution, productivity, diet and conservation, 53-60. In: Mizera T & Meyburg B-U (eds) International meeting on spotted eagles (Aquila clanga, A. pomarina and A. hastata) - Research and conservation. Biebrza National Park, Osowiec, Poznan, Berlin, 268.Search in Google Scholar

Väli Ü, Dombrovski V, Treinys R, Bergmanis U, Daroczi SJ, Dravecky M, Ivanovski V, Lontkowski J, Maciorowski G, Meyburg B-U, Mizera T, Zeitz R & Ellegren H 2010a. Widespread hybridization between the greater spotted eagle Aquila clanga and the lesser spotted eagle A. pomarina (Aves: Accipitriformes) in Europe. Biological Journal of the Linnean Society 100: 725-736. DOI: 10.1111/j.1095-8312.2010.01455.x.10.1111/j.1095-8312.2010.01455.xSearch in Google Scholar

Väli Ü, Saag P, Dombrovski V, Meyburg B-U, Maciorowski G, Mizera T, Treinys R & Fagerberg S 2010b. Microsatellites and single nucleotide polymorphisms in avian hybrid identification: a comparative case study. Journal of Avian Biology 41: 34-49. DOI: 10.1111/j.1600-048X.2009.04730.x.10.1111/j.1600-048X.2009.04730.xSearch in Google Scholar

Väli Ü, Männik R, Nellis R, Sein G & Tuvi J 2011: Eesti kotkaste seire: näiteid haruldaste liikide staatuse ja arvukuse määramisest [Monitoring Estonian eagles: examples of estimating status and numbers of rare species], 92-106. In: Kull T, Liira J & Sammul M (eds). Eesti Loodusuurijate Seltsi Aastaraamat. Eesti Looduseuurijate Selts, Tartu, total number of pages. [In Estonian with English summary] Search in Google Scholar

Valkama J, Vepsäläinen V & Lehikoinen A 2011: 3rd Finnish bird atlas. Finnish Museum of Natural History and The Ministry of the Environment. Retrieved April 15, 2015, from http://atlas3.lintuatlas.fi.Search in Google Scholar