Name
Laridae
Black-headed gull
Framing
Phylum: Chordata
Subphylum: Vertebrata
Class: Aves
Order: Charadriiformes
Family: Laridae
Habitat
Frequent on coasts but also very common in inland marshes, lagoons, rivers and reservoirs, where it nests. Common in cities. When searching for food, it can frequent diverse environments, from fishing ports to rubbish dumps, as well as inland farmland (where it is common to see it following ploughshares), rice fields or salt marshes.
Feeding
Free. Gregarious. Mainly predatory on aquatic or terrestrial invertebrates, some fish and small terrestrial vertebrates, although it also consumes rubbish in rubbish dumps and plant matter.
Distribution
Palaearctic and Ethiopian and eastern regions, marginally reaching North America. Summering in the northern half of its range and wintering in the southern half, with a band of sedentary populations in Western Europe.
Conservation status
Not threatened
Additional information
Free. Gregarious. Small gull (36 cm), more slender than the yellow-legged and sombre, with red legs and bill, the latter being rather thin, a very light grey back, and a dark head in spring, a chocolate colour that does not cover the nape of the neck. In winter the dark on the head is relegated to two clearly visible bands at the level of the eyes and ears. In flight, a white wing edge is very typical, contrasting with the grey of the back and the black tips of the primaries. Other dark-headed Spanish gulls lack this white wing panel, the dark on the head reaches lower on the nape of the neck and in the black-headed gull it is jet-black. The young have grey, white and yellowish-brown mottling on the wings and back, but the underparts, obispillum and wing panels are already white, and in the second winter they reach adult plumage.
Additional information
Bibliography
- Evans, M.H.R., Lihou, K.L. & Rands, S.A. (2018). Black-headed gulls synchronise their activity with their nearest neighbours. Sci Rep 8, 9978 (2018). https://doi.org/10.1038/s41598-018-28378-x
- Feng, C. & Liang, W. (2020). Behavioral responses of black-headed gulls (Chroicocephalus ridibundus) to artificial provisioning in China. Global Ecology and Conservation, 21, e00873. https://doi.org/10.1016/j.gecco.2019.e00873.
- Kamiński, M., Janiszewski, T., Indykiewicz, P. et al. (2021). Density-dependence of nestling immune function and physiological condition in semi-precocial colonial bird: a cross-fostering experiment. Front Zool 18, 7. https://doi.org/10.1186/s12983-021-00388-y
- Scott, P., Duncan, P. & Green, J.A. (2015). Food preference of the Black-headed Gull Chroicocephalus ridibundus differs along a rural–urban gradient. Bird Study, 62(1), 56-63, DOI: 10.1080/00063657.2014.984655
- Skórka, P., Wójcik, J.D., Martyka, R. et al. (2012). Numerical and behavioural response of Black-headed Gull Chroicocephalus ridibundus on population growth of the expansive Caspian Gull Larus cachinnans . J Ornithol 153, 947–961. https://doi.org/10.1007/s10336-012-0824-4