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Pallas's gull - Wikipedia

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Pallas's gull

Conservation status
Least Concern (IUCN 3.1)^[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Charadriiformes
Family:	Laridae
Genus:	Ichthyaetus
Species:	I. ichthyaetus
Binomial name
*Ichthyaetus ichthyaetus* (Pallas, 1773)

Range of I. ichthyaetus Breeding Non-breeding
Synonyms
Larus ichthyaetus

Pallas's gull (Ichthyaetus ichthyaetus), also known as the great black-headed gull, is a large bird species. As is the case with many gulls, it has traditionally been placed in the genus Larus.^[2] The scientific name is from Ancient Greek. Ichthyaetus is from ikhthus, "fish", and aetos, "eagle".^[3]

Distribution

This species breeds in colonies in marshes and islands from southern Russia to Mongolia. It is migratory, wintering in the eastern Mediterranean, Arabia and India. This gull nests on the ground, laying between two and four eggs.

It occurs in western Europe only as a vagrant. In Great Britain a recent review left a single occurrence in 1859 as the only acceptable record of this bird. The species also occurs as a vagrant in differing parts of the Indian Ocean, south of its normal range, and along the northern and eastern coasts of Africa, where it visits annually on an irregular basis.^[4]

Description

This is a very large gull, being easily the world's largest black-headed gull and the third largest species of gull in the world, after the great black-backed gull and the glaucous gull. It measures 55–72 cm (22–28 in) in length with a 142 to 170 cm (56 to 67 in) wingspan.^[5]^[6]^[7] Weight can vary from 0.96–2.1 kg (2.1–4.6 lb), with an average of 1.6 kg (3.5 lb) in males and 1.22 kg (2.7 lb) in females.^[8] Among standard measurements, the wing chord is 43.5 to 52 cm (17.1 to 20.5 in), the bill is 4.7 to 7.3 cm (1.9 to 2.9 in) and the tarsus is 6.5 to 8.4 cm (2.6 to 3.3 in).^[6] Summer adults are unmistakable, since no other gull of this size has a black hood. The adults have grey wings and back, with conspicuous white "mirrors" at the wing tips. The legs are yellow and the bill is orangey-yellow with a red tip.

In all other plumages, a dark mask through the eye indicates the vestiges of the hood. The call is a deep aargh cry. Young birds attain largely grey upperparts quite rapidly, but they take four years to reach maturity.

Ecology

This bird has a deep, rather nasal flight-call which resembles the call of the lesser black-backed gull. Although they are noisy at colonies, Pallas's gulls are mostly silent when breeding.

These birds are predatory, taking fish, crustaceans, insects and even small mammals.

The Pallas's gull is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

Egg, collection Museum Wiesbaden, Germany
Adult with chick, Kalmykia, Russia.
juvenile
adult with juvenile, Romania
First-winter in India

References

^ Butchart, S.; Symes, A. (2012). "Larus ichthyaetus". IUCN Red List of Threatened Species. 2012: e.T22694379A38839205. doi:10.2305/IUCN.UK.2012-1.RLTS.T22694379A38839205.en. Retrieved 20 February 2022.
^ Pons, J.M.; Hassanin, A.; Crochet, P.A. (2005). "Phylogenetic relationships within the Laridae (Charadriiformes: Aves) inferred from mitochondrial markers". Molecular Phylogenetics & Evolution. 37 (3): 686–699. doi:10.1016/j.ympev.2005.05.011. PMID 16054399.
^ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 224. ISBN 978-1-4081-2501-4.
^ Stevenson, Terry; Fanshawe, John (2001). Field Guide to the Birds of East Africa: Kenya, Tanzania, Uganda, Rwanda, Burundi. Elsevier Science. ISBN 978-0856610790.
^ Panayotov, Sergey. "Birds in Bulgaria". Birds in Bulgaria. Retrieved 19 October 2011.
^ ^a ^b Olsen, Klaus Malling; Larsson, Hans (2004). Gulls: of North America, Europe, and Asia. Princeton University Press. ISBN 978-0691119977.
^ Harrison, Peter (1991). Seabirds: An Identification Guide. Houghton Mifflin Harcourt. ISBN 978-0-395-60291-1.
^ Dunning, John B. Jr., ed. (1992). CRC Handbook of Avian Body Masses. CRC Press. ISBN 978-0-8493-4258-5.

External links

Wikimedia Commons has media related to Ichthyaetus ichthyaetus.

Wikispecies has information related to Ichthyaetus ichthyaetus.

BirdLife species factsheet for Larus ichthyaetus
"Ichthyaetus ichthyaetus". Avibase.
"Great black-headed gull media". Internet Bird Collection.
Great black-headed gull photo gallery at VIREO (Drexel University)
Interactive range map of Larus ichthyaetus at IUCN Red List maps
Audio recordings of Pallas's gull on Xeno-canto.
Larus ichthyaetus in Field Guide: Birds of the World on Flickr
Pallas's gull media from ARKive

v t e Gulls (family: Laridae)
Genus	Species († indicates a species confirmed to be extinct)
Larus	Pacific gull Belcher's gull Olrog's gull Black-tailed gull Heermann's gull Common gull Short-billed gull Ring-billed gull California gull Great black-backed gull Kelp gull (or Cape gull) Glaucous-winged gull Western gull Yellow-footed gull Glaucous gull Iceland gull Thayer's gull European herring gull American herring gull Yellow-legged gull Caspian gull Vega gull (or East Siberian gull / Mongolian gull) Armenian gull Slaty-backed gull Lesser black-backed gull Heuglin's gull
Ichthyaetus	White-eyed gull Sooty gull Great black-headed gull (or Pallas's gull) Audouin's gull Mediterranean gull Relict gull
Leucophaeus	Dolphin gull Laughing gull Franklin's gull Lava gull Grey gull
Chroicocephalus	Silver gull Red-billed gull Huahine gull † Hartlaub's gull Brown-hooded gull Grey-headed gull (or grey-hooded gull) Andean gull Black-billed gull Brown-headed gull Black-headed gull Slender-billed gull Bonaparte's gull Saunders's gull
Hydrocoloeus	Little gull
Rhodostethia	Ross's gull
Rissa	Black-legged kittiwake Red-legged kittiwake
Pagophila	Ivory gull
Xema	Sabine's gull
Creagrus	Swallow-tailed gull
Gull eggs as food Hybridisation in gulls

Taxon identifiers
Ichthyaetus ichthyaetus	Wikidata: Q476356 Wikispecies: Ichthyaetus ichthyaetus ADW: Larus_ichthyaetus Avibase: EF930CDC7CE618F7 BOW: gbhgul2 CoL: 6N5PH eBird: gbhgul2 EoL: 45513592 GBIF: 8028588 IBC: great-black-headed-gull-larus-ichthyaetus iNaturalist: 144521 ITIS: 824068 NBN: NHMSYS0021274091 NCBI: 126702 Open Tree of Life: 993037 Xeno-canto: Ichthyaetus-ichthyaetus
Larus ichthyaetus	Wikidata: Q25652653 ARKive: larus-ichthyaetus BioLib: 8688 BirdLife: 22694379 CoL: 3SBQH CMS: larus-ichthyaetus EUNIS: 12019 EURING: 5730 Fauna Europaea (new): e7e2033d-44e9-4b0e-a4d1-19425dc9462d GBIF: 2481155 IRMNG: 10188790 ITIS: 176855 IUCN: 22694379 NBN: NHMSYS0000530431 OBIS: 212627 SeaLifeBase: 75087 WoRMS: 212627

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