Short report on probable case of Caspian Gull predation on migrating swallows observed at first time

Litwiniak, Klaudia; Przymencki, Marcin; Celiński, Damian

doi:10.2478/orhu-2020-0012

Abstract

At Mietków Reservoir (SW Poland), during the breeding season of 2019, we found 52 dead swallows in Caspian Gull (Larus cachinnans) colony. Most of them were Barn Swallows (Hirundo rustica). The bodies of swallows were fresh and torn with traces of bill. We assume that swallows might have been in weak condition and hunted by gulls. They also could die because of bad weather conditions and hypothermia, fell into the water and then were taken. However, to our knowledge, it was the first mass event of feeding on migrating birds by Caspian Gull.

References

Avdanin, V. O., Viksne, Y. A., Zubakin, V. A., Kishchinsky, A. A., Litvinenko, N. M., Lobkov, E. G., Nechaev, V. A., Firsova, L. V., Flint, V. E. & Yudin, K. A. 1998. Birds of the USSR. Gulls. – Nauka, Moscow (in Russian)
Search in Google Scholar Back to article
Dierschke, V. 2001. Large gulls as predators of passerine landbirds migrating across the southeastern North Sea. – Ornis Svecica 11: 171–180.10.34080/os.v11.22855
Search in Google Scholar Back to article
Gwiazda, R., Bukaciński, D., Neubauer, G., Faber, M., Betleja, J., Zagalska-Neubauer, M., Bukacińska, M. & Chylarecki, P. 2011. Diet composition of the Caspian Gull (Larus cachinnans) in inland Poland: effects of breeding area, breeding stage and sympatric breeding with Herring Gull (Larus argentatus). – Ornis Fennica 88: 80–89.10.51812/of.133765
Search in Google Scholar Back to article
Kiselev, F. A. 2009. Agricultural value of the Caspian Gulls Larus argentatus cachinnans. – Russian Bird Watch 18: 1595–1603. (in Russian)
Search in Google Scholar Back to article
Macdonald, S. M. & Mason, C. F. 1973. Predation of migrant birds by gulls. – British Birds 66: 361–363.
Search in Google Scholar Back to article
Mansueti, R. J. 1961. Waterfowl predation by and records of the Great Black-backed Gull in Chesapeake Bay during winter and spring. – Chesapeake Science 2(1–2): 102–104.10.2307/1350730
Search in Google Scholar Back to article
Nietlisbach, P., Germain, R. R. & Bousquet, C. A. H. 2014. Observations of Glaucous-winged Gulls preying on passerines at a Pacific Northwest colony. – The Wilson Journal of Ornithology 126(1): 155–158. DOI: 10.1676/13-077.110.1676/13-077.1
Search in Google Scholar Back to article
Skórka, P. & Wójcik, J. D. 2008. Habitat utilisation, feeding tactics and age-related feeding efficiency in the Caspian Gull Larus cachinnans. – Journal of Ornithology 149(1): 31–39. DOI: 10.1007/s10336-007-0208-310.1007/s10336-007-0208-3
Search in Google Scholar Back to article
Tinbergen, N. 1953. The Herring Gull’s World. – Frederick A. Praeger, Inc. London
Search in Google Scholar Back to article

Short report on probable case of Caspian Gull predation on migrating swallows observed at first time

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