Ивайло Ангелов [публикации]

Demerdzhiev, D., Dobrev, D., Delchev, A., Iliev, M., Georgiev, G., Terziev, N., Angelov, I., Arkumarev, V., 2025. Temporally determinate, but spatially consistent breeding performance of Lesser Spotted Eagle (Clanga pomarina) along the southern periphery of its distribution. — Diversity, 17 (8): 566. [PDF]

Angelov, I., Sarrouf, M., Al Lawati, R., Vegh, A., 2025. High occurrence of polygynous trios in a dense Egyptian Vulture Neophron percnopterus population. — Ringing & Migration, 1—5. https://doi.org/10.1080/03078698.2025.2559118 [PDF]

Angelov, I., Sarrouf, M., Al Lawati, R., McGrady, M., 2025. Stability of a resident Egyptian Vulture Neophron percnopterus population on Masirah island, Oman. — Sandgrouse, 47 (1): 193—202. [PDF]

Angelov, I., Klisurov, I., Stoyanov, G., Gradinarov, D., Stoynov, E., Arkumarev, V., Zhisov, P., Yordanov, E., Dimchev, I., Dobrev, D., Mladenov, V., Dobrev, V., Stamenov, A., Vasilev, V., Iliev, M., Peshev, H., Demerdzhiev, D., Stanchev, S., Petrov, P., Yovchev, G., Kolchagov, R., 2025. Drones revolutionize the monitoring of notoriously difficult to study raptors: breeding performance of Golden Eagles (A. chrysaetos) in Bulgaria. — Poster presentation at BalkanBio conference, 30—31 Oct., Plovdiv University, Plovdiv, Bulgaria. [PDF]

Angelov, I. D., Dobrev, D., Claase, M. J., Fay, J.M., de Bont, M., Buechley, E. R., 2025. Using satellite imagery to map potential colonies of Rüppell’s vultures (Gyps rueppelli) in Central and East Africa. — Ibis. https://doi.org/10.1111/ibi.13454 [PDF]

Angelov, I., 2025. The first documentation of a juvenile eastern imperial eagle (Aquila heliaca) with an unstreaked body. — Raptor Journal, 19. https://doi.org/10.2478/srj-2025-0005 [PDF]

Daskalova, G., Shurulinkov, P., Klisurov, I., Angelov, I., Demerdzhiev, D., Petrov, R., 2024. Observations on the behavior of the saker falcon (Falco cherrug) breeding in Bulgaria. — Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa”, 67 (1): 153—165. [PDF]

Angelov, I., Ragyov, D., Stoyanov, G., Koychev, V., Tonchev, B., Shurulinkov, P., Demerdzhiev, D., Stoynov, E., Dimchev, I., Gradinarov, D., Hristov, H., Dobrev, D., Arkumarev, V., Vassilev, V., Klisurov, I., Dobrev, V., Kurtev, M., Yotsova, T., Daskalova, G., Nikolov, B., Stoychev, S., Profirov, L., Iankov, P., Petrov, T., 2024. Status of the Golden Eagle in Bulgaria. — In: Bautista-Rodríguez, J., Ellis, D. H. (eds). The Golden Eagle around the world. Hancock House Publishers.

Angelov, I., Abebe, Y. D., Yotsova, T., Dobrev, V., 2024. Another case of communal breeding in the White-backed Vulture Gyps africanus. — Vulture News, 86: 13—15. [PDF]

Angelov, I., 2024. Exceptionally Low Proportion of Adult Pairs and Male-Skewed Adult Sex Ratio in a Declining Population of the Golden Eagle Aquila chrysaetos (L., 1758) (Accipitriformes: Accipitridae). — Acta zoologica bulgarica. [PDF]

Demerdzhiev, D. A., Dobrev, D. D., Delchev, A. G., Angelov, I. D., Terziev, N. G., Iliev, M. D., Georgiev, G. S., Boev, Z. N., Nedyalkov, N. P., Arkumarev, V. S., 2023. Distribution, population status, habitats, and conservation of Lesser Spotted Eagle in Bulgaria. — Proceedings of Conferences Raptors Conservation 2023, Suppl. 2: 32—34. https://doi.org/10.19074/1814-8654-2023-2-32-34 [PDF]

Angelov, I., Ming, M., Dixon, A., 2023. Breeding dispersion of raptors in the Junggar basin, Xinjiang, China with observations on close-nesting by Saker Falcon (Falco cherrug) and Golden Eagle (Aquila chrysaetos). — Journal of raptor research, 57 (4): 676—679. [PDF]

Angelov, I., 2023. Studying the nesting biology of Golden eagles (Aquila chrysaetos) by use of a trap camera. — Poster presentation in Third International scientific practical conference “Eagles of the Palearctic: Study and Conservation”, Almaty, Kazakhstan. 24—29.IX.2023. [PDF]

Angelov, I., 2023. An understudied cause of the population decline of the Egyptian Vulture (Neophron percnopterus): a perspective. — Acta zoologica bulgarica, Supplement 17: 75—79. [PDF]

Angelov, I., 2023. A first detailed description of building a new nest and new data on the courtship behaviour of golden eagle. — Raptor Journal, 17 (1): 29—34. [PDF]

Ангелов, И., 2023. За скалния орел. — Природа, 1: 28—33. [PDF]

Demerdzhiev, D., Angelov, I., Dobrev, D., 2022. Foraging Patterns of Non-Territorial Eastern Imperial Eagle (Aquila heliaca): A Case of Successful Adaptation. — Diversity 14, 1060. https://doi.org/10.3390/d14121060 [PDF]

Dobrev, D., Borisov, B., Dobrev, V., Arkumarev, V., Angelov, I., Stoychev, S., 2021. The Goosander Mergus merganser range expansion on the Balkan Peninsula and new breeding population in Bulgaria. — Acrocephalus, 41 (184/185): 25—30. https://doi.org/10.2478/acro-2020-0002

Meyburg, B., Angelov, I., Azar, S., 2020. A corridor of soaring bird migration in Lebanon on the Eastern Mediterranean flyway. — Sandgrouse, 42: 46—58. [PDF]

Arkumarev, V, McGrady, M., Angelov, I., 2020. A literature review of occurrence of Egyptian Vulture (Neophron percnopterus) resident in Africa. — Vulture News, 77: 1—54. [PDF]

Angelov, I, Bougain, C., Schulze, M., al Sariri, T., McGrady, M., Meyburg, B.-U., 2020. Oman confirmed as a stronghold for resident globally endangered Egyptian Vulture (Neophron percnopterus). — Ardea, 108: 73—82. [PDF]

Даскалова, Г., Шурулинков, П., Ангелов, И., Петров, П., 2020. Птиците на Тунджанската хълмиста низина. — Globe Edit, 400 стр.

Angelov, I., Hashim, I., 2019. Birds of prey observed during vulture surveys in northeast Sudan. — Scopus, 39 (2): 1—8. [PDF]

Angelov, I., 2015. Steppe Eagle (Aquila nipalensis). — In: Golemansky, V., Peev, D., Chipev, N., Beron, P., Biserkov, V. (eds). Red Data Book of the Republic of Bulgaria. Volume 2. Animals. Bulgarian Academy of Sciences & Ministry of Environment and Waters, Sofia. [PDF]

Demerdzhiev, D., Hristov, H., Dobrev, D., Angelov, I., Kurtev, M., 2014. Long-term population status, breeding parameters and limiting factors of the Griffon Vulture (Gyps fulvus Hablizl 1783) population in the Eastern Rhodopes, Bulgaria. — Acta Zoologica Bulgarica, 66 (3): 373—384. [PDF]

Nikolov, S., Nikolov, C., Angelov, I., 2013. First record on ground nesting of Egyptian Vulture Neophron percnopterus (Aves: Accipitriformes) in Continental Europe. — Acta Zoologica Bulgarica, 65 (2): 417—419. [PDF]

Angelov, I., Yotsova, T., Sarrouf, M., McGrady, M., 2013. Large increase of the Egyptian Vulture Neophron percnopterus population on Masirah island, Oman. — Sandgrouse, 35: 140—152. [PDF]

Angelov, I., Abdu, B., Terziev, N., Zelleke, S., 2013. Possible sighting of the Indian subspecies of the Egyptian Vulture Neophron percnopterus ginginianus in Africa. — Vulture News, 64: 44—49. [PDF]

Angelov, I., Hashim, I., Oppel, S., 2012. Persistent electrocution mortality of Egyptian Vultures Neophron percnopterus over 28 years in East Africa. — Bird Conservation International, 1—6. [PDF]

Demerdzhiev, D., Stoychev, S., Terziev, N., Angelov, I., 2011. Status of the Eastern Imperial Eagle (Aquila heliaca) in the European pert of Turkey. — Acta zool. bulg., Suppl. 3: 87—93. [PDF]

Angelov, I., Hashim, I., 2011. First record of Bonelli’s Eagle Aquila fasciatus in Sudan. — Scopus, 31: 42—45. [PDF]

Dixon, A., Ragyov, D., Ayas, Z., Deli, M., Demerdziev, D., Angelov, I., Kmetova, E., Nedyalkov, N., 2009. Population status of breeding Saker Falcons (Falco cherrug) in Turkey. — Avian Biology Research, 2 (4): 213—220. [PDF]

Demerdjzev, D., Stoychev, S., Petrov, Tz., Angelov, I., Nedyalkov, N., 2009. Impact of Power Lines on Bird Mortality in Southern Bulgaria. — Acta zoologica bulgarica, 61 (2): 175—183. [PDF]

Angelov, I., 2009. Numbers, ecology, behavior, threats and conservation measures for the Eastern Imperial Eagle (Aquila heliaca) in the region of Sliven, Bulgaria. — MS Thesis. Sofia University St Kliment Ohridski, Biology Faculty. 85 pp.

Ragyov, D., Demerdziev, D., Angelov, I., 2008. Peregrine in Bulgaria — General overview. — In: Sielicki, J., Mizera, T. (eds). Peregrine Falcon Populations-status and perspectives in the 21st Century. Tutul, Warsaw 2008, 345—360. [PDF]

Nikolov, S., Ivanov, I., Angelov, I., 2008. New data on the roosting sites of the Raven (Corvus corax) in Bulgaria. — Acrocephalus, 28 (135): 168—169. [PDF]

Genov, P., Dutsov, A., Dimitrova, D., Stoyanova, N., Angelov, I., Zlatanova, D., Peshev, D., Arabadjiev, D., Georgiev, T., Serafimov, G., Sariyski, S., 2008. The role of Wolf (Canis lupus L.) in the Rhodope Mountains in the beginning of the 21st century. — Acta zool. bulg., Suppl. 2: 153—160. [PDF]

Spiridonov, J., Georgiev, D., Angelov, I., 2007. Red-breasted Flycatcher Ficedula parva. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 524—525. [PDF]

Petrov, Tz., Hristov, I., Angelov, I., 2007. The population of the White Stork (Ciconia ciconia) in Bulgaria in 2004—2005. — In: Petrov, Ts. (man. ed.). The White Stork (Ciconia ciconia) in Bulgaria, II. Bulgarian Society for the Protection of Birds, Conservation Series, Book 12, BSPB, Plovdiv. [PDF]

Куртев, М., Ангелов, И., Демерджиев, Д., Стойнов, Е., Янков, П., Христов, Х., 2007. Египетски лешояд Neophron percnopterus. — В: Янков, П. (отг. ред.) Атлас на гнездещите птици в България. Българско дружество за защита на птиците. Природозащитна поредица, Книга 10. БДЗП, София, 132—134. [PDF]

Куртев, М., Ангелов, И., Демерджиев, Д., Христов, Х., 2007. Степен орел Aquila nipalensis. — В: Янков, П. (отг. ред.) Атлас на гнездещите птици в България. Българско дружество за защита на птиците. Природозащитна поредица, Книга 10. БДЗП, София, 162—163. [PDF]

Georgiev, D., Angelov, I., Daskalova, G., Stoychev, S., 2007. Isabelline wheatear Oenanthe isabellina. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 442—443. [PDF]

Georgiev, D. Angelov, I., Dereliev, S., Daskalova, G., 2007. Red-footed falcon Falco vespertinus. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 178—179. [PDF]

Angelov, I., Stoychev, S., Stoynov, E., 2007. Montagu’s harrier Circus pygargus. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 146—147. [PDF]

Angelov, I., Iankov, P., 2007. Rufous Bush Chat Erythropygia galactotes. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 424—425. [PDF]

Angelov, I., Georgiev, D., Stoychev, S., 2007. Stort-toed Lark Calandrella brachydactyla. — In: Iankov, P. (ed.) Atlas of the breeding birds in Bulgaria. Bulgarian Society for the Protection of Birds. Conservation series, book 10. Sofia, BSPB, 380—381. [PDF]

Angelov, I., Lei, L., Yu, M., Balasz I., Ming, M., Dixon, A., 2006. Possible mixed pairing between Saker Falcon (Falco cherrug) and Barbary Falcon (Falco pelegrinoides) in China. — Falco, 28: 14—15. [PDF]