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Svetoslav Spasov, Volen Arkumarev, Dobromir Dobrev and Vladimir Dobrev

References Akumarev, V., Myumyun, S. & Dyulgerova, S. (2012): Survey on the Egyptian Vulture population in Asia Minor, Turkey. Project Report. - Bulgarian Society for the Protection of Birds, Sofia. BSPB (2005): Observation of autumn migration of soaring birds in Bulgaria in 2004 in terms of identification of bottleneck IBAs to be included in the European Ecological Network NATURA 2000. - Bulgarian Society for the Protection of Birds, Sofia. (available at http://bspb.org/article_files/127713194912.pdf.) BSPB

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Nikolai Petkov

differentaged duck broods and juvenile ducks. - Wildlife Biology 1 (3): 181-187. Petkov, N. (2000): Population trends of breeding Ferruginous Duck in Bulgaria. - TWSG News 12: 44-49. Petkov, N. (2003): Ferruginous Duck Habitat Characteristics and Diurnal Activity Rhythm in Bulgaria. pp. 122-128 In: Petkov, N., Hughes, B. & Gallo- Orsi, U. (eds.): Ferruginous Duck: From Research to Conservation. BSPB Conservation Series No. 6. - BirdLife International & BSPB-TWSG, Sofia. Petkov, N. (2011a): Ferruginous Duck ( Aythya nyroca

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Stoycho Stoychev, Dimitar Demerdzhiev, Svetoslav Spasov, Dobromir Dobrev and Bernd-Ulrich Meyburg

)], 1 32-1 61 . In: Iankov P (ed), Global threatened birds in Bulgaria. National Action plans for the conservation. Part 1 . BSPB-MOSV, Conservation Series, Book 4, BSPB, Sofia, 227. [In Bulgarian] Stoychev S, Ivanov I, Petrov T, Marin S, Demerdzhiev D, Gradev G & Domuschiev D 2004: Status of the eastern imperial eagle (Aquila heliaca) in Bulgaria between 1 994 and 2002, 653-660. In: Chancellor RD & Meyburg B-U (eds): Raptors worldwide. Proceedings of the VI world conference on birds of prey and owls. Budapest, Hungary 1 8-23 May 2003World Working

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Dimitar Demerdzhiev, Stoycho Stoychev, Dobromir Dobrev, Svetoslav Spasov and Nikolay Terziev

. The role of prey availability and environmental stochasticity. Oikos 1 08: 523-534. DOI: 1 0.1111 /j.0030-1 299.2005.-1 351 4.x. Petrov T & Stoychev S 2002: Natsionalen plan za deystvie za tsarskiya orel (A. heliaca) v Balgariya [National Action Plan for the imperial eagle (A. heliaca)], 1 32-1 61 . In: Iankov P (ed), Global threatened birds in Bulgaria. National Action plans for the conservation. Part 1 . BSPB-MOSV, Conservation Series, Book 4, BSPB, Sofia, 227. [In Bulgarian] Roth T & Amrhein V 201 0. Estimating individual survival

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Vladimir Mladenov, Ralitsa Georgieva, Mihail Iliev, Yana Barzova, Sylvia Djulgerova, Mirjan Topi, Roland Lleshi and Stoyan C. Nikolov

/11/2016. G ibbons D. W., G regory R. D. (2006): Birds. In: Sutherland, W. J. (Ed.) Ecological census techniques – a handbook. 2 nd Edn. – Cambridge University Press, UK, pp. 308–350. I ankov P. (2015): Tourist product for Key Biodiversity Areas of Narta Lagoon, Butrinti and Vlora Bay. Technical report under the CEPF project Land of Eagles and Castles: Pilot Sustainable Tourism Model for the Albanian Adriatic Coastline (ID: 62721). – BSPB & PPNEA. 40 pp. I ankov P., S taneva A., T opi M., N ikolov S. (2015): Soaring Bird Migration Along the Adriatic

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Dimitar Demerdzhiev, Dobromir Dobrev, Stoycho Stoychev, Nikolay Terziev, Svetoslav Spasov, Zlatozar Boev and Stoycho Stoychev

Abstract

During the period 2008-201 3, 32 different breeding territories were occupied by eastern imperial eagles (EIEs). These territories were mainly distributed in two regions: the Dervent Heights/Yıldız Mts. and the area to the north of the Marmara sea coast. The nearest neighbour distance established was 4.2 km. The mean distance between pairs was 1 0.44±2.95 km. The mean value of breeding success for the period 2008-201 3, including 1 07 cases of incubation, was 1 .01±0.1 0. The mean breeding success of birds in the Marmara region (1 .05±0.78) was higher than that in the Dervent Heights/Yıldız Mts. (0.91±0.84). The present study on the diet of the EIE was based on the remains of 582 prey items of at least 70 taxa. Mammals were the most common group (46.5%), followed by birds (32.4%) and reptiles (20.3%). The white-breasted hedgehog (Erinaceus roumanicus) was the most common prey, followed by two tortoises - Hermann's tortoise (Eurotestudo hermanni) and the Greek tortoise (Testudo graeca) - which together accounted for a total of 1 4.4% of the prey caught. The prey species particularly represented in the food spectrum of the studied pairs were: the yellow-legged gull (Larus michahellis), the European souslik (Spermophilus citellus), the chicken (Gallus gallus f. domestica) and the white stork (Ciconia ciconia). These species together accounted for 67.8% of the prey caught. There was a statistically significant difference (Z=2.52, p=0.01 ) in the food preferences of the EIEs in the two studied regions.

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Remo Probst, Larisa Bogdea, Dan S. Bandacu, Mirko Bohuš, Svilen Cheshmedzhiev, Ákos Gáborik, Siegfried Geissler, Calin V. Hodor, Dan T. Ionescu, Veselin Koev, Tibor Mikuska, Zsolt Nagy, Tibor Parrag, Vlatko Rožac, Matthias Schmidt, Thomas Schneider, Marko Šćiban, Sándor Tatai, Emil Todorov, Adrian Tomik, Marko Tucakov, Miklós Váczi and Georg Frank

Abstract

In January 2014, the first ever comprehensive winter census of the Whitetailed Eagle Haliaeetus albicilla along the Danube River was conducted, using mostly point and transect counts. Altogether, 550-700 eagles were counted. The upper range of the estimate may in fact be more realistic because 615 km of the Danube were not surveyed. Birds were observed in every country along the Danube. Hotspots of occurrences were (1) the Central Danube floodplains - the area encompassing the lower Hungarian section (Danube- Drava National Park), Kopački rit Nature Park (Croatia), and the Gornje Podunavlje Special Nature Reserve (Serbia); and (2) the Danube Delta Biosphere Reserve. According to the Action Plan for the conservation of the White-tailed Eagle along the Danube, future winter counts should be made regularly, and lower variation in the resulting eagle numbers achieved by a higher degree of synchronization between individual countries. This study reinforces the importance of protected areas along the Danube as a backbone for the conservation of White-tailed Eagles and biodiversity.

Open access

Zlatozar Boev

BUNARCO (2008): Bulgarian National Rarities Committee Database. - BSPB, Sofia. Boev, N. (1962): Northern Gannet - Sula bassana. pp 325 In: Peshev, T. & Boev, N. (1962): Fauna of Bulgaria. A Brief Guide (of Vertebrate Animals). - Narodna Prosveta Publ. House, Sofia. (in Bulgarian) Burcak-Abramovic, N. & Calkin, V. (1971): K poznaniju ornitofauni juga Ukraini, Krima i Podonia (po arheologicheskim materialam). - Bull. MOIP Otd. Biol. 75: 54-63. Burcak-Abramovic, N. & Calkin V. (1974): Zaleti

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Girgina Daskalova, Peter Shurulinkov, Georgi P. Stoyanov and Borislav Borisov

and winter behaviour of Iberian lesser kestrels Falco naumanni revealed by geolocators. Ibis 153: 154-164. DOI: 10.1111/j.1474-919X.2010.01073.x Cramp S & Simmons KE (eds) 1980: Handbook of the birds of Europe, the Middle East and North Africa. Vol. 2. Hawks to bustards. Oxford University Press. Oxford, 695. Gospodinov K 2015: Beloshipi vetrushki gnezdyat na teritoriyata na “Lukoil Neftohim” do Burgas [Lesser kestrels nest on the territory of "Lukoil Neftohim" at Burgas]. Retrieved August 21, 2015, from http://bspb

Open access

Doina Cioacă

. and Gramatikov M. (eds), 2007 - Important Bird Areas in Bulgaria and Natura 2000i , BSPB Conservation Series 11. Sofia: Bulgarian Society for the Protection of Birds. (in Bulgarian and English). 8. Papp T. and Fântână C. (eds), 2008 - Ariile de Importanţă Avifaunistică din România. Tîrgu- Mureş: Societatea Ornitologică Română, Bucureşti şi Asociaţia pentru Protecţia Păsărilor şi a Naturii 'Grupul Milvus'. (in Romanian) 9. *** Council Directive 79/409/EEC of 2 April 1979 on the conservation of wild birds (Directiva Consiliului Europei