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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Ordo: Charadriiformes
Subordo: Lari
Familia: Laridae
Subfamilia: Larinae
Genus: Rhodostethia
Species: Rhodostethia rosea
Name
Rhodostethia rosea (MacGillivray, 1824)
Synonyms
Larus roseus (protonym)
References
Memoirs of the Wernerian Natural History Society 5: 249.
Vernacular names
čeština: Racek růžový
English: Ross's Gull
Esperanto: Roza mevo
eesti: Roosakajakas
suomi: Ruusulokki
français: Mouette rosée
íslenska: Rósamáfur
한국어: 쇠목테갈매기
norsk: Rosenmåke
polski: Mewa różowa
русский: Розовая чайка
svenska: Rosenmås
oss's gull (Rhodostethia rosea) is a small gull, the only species in its genus, although it has been suggested it should be moved to the genus Hydrocoloeus, which otherwise only includes the little gull. This bird is named after the British explorer James Clark Ross. Its breeding grounds were first discovered in 1905 by Sergei Aleksandrovich Buturlin near the village of Pokhodsk in North-Eastern Yakutia, while visiting the area as a [2] judge. The genus name Rhodostethia is from Ancient Greek rhodon, "rose", and stethos, "breast". The specific rosea is Latin for "rose-coloured".[3]
Description
A Ross's gull
An adult in non-breeding plumage.
This small bird is similar in size and some plumage characteristics to the little gull. It is slightly larger and longer winged than the little gull species, and has more-pointed wings and a wedge-shaped tail. Its legs are red. Summer adults are pale grey above and white below, with a pink flush to the breast, and a neat black neck ring. In winter, the breast tints and neck collar are lost and a small dark crescent develops behind the eye.[4]
Young birds resemble winter adults, but have a dark "W" pattern on the wings in flight, like young little gulls. The juveniles take two years to attain full adult plumage.
Ross's gull measurements:[5]
Length: 11.4-12.2 in (29-31 cm)
Weight: 4.9-8.8 oz (140-250 g)
Wingspan: 35.4-39.4 in (90-100 cm)
Distribution and habitat
Ross's gull breeds in the high Arctic of northernmost North America, and northeast Siberia. It migrates only short distances south in autumn, most of the population wintering in northern latitudes at the edge of the pack ice in the northern Bering Sea and in the Sea of Okhotsk, although some birds reach more temperate areas, such as north west Europe; in February 2016 they were sighted in Cornwall and Ireland according to the BTOs 'BirdTrack', in December 2021 two were seen in Belgium, one in Nieuwpoort[6] and one in Zeebrugge.[7] In North America, a Ross's gull has been spotted as far south as Salton Sea in California, although sightings this far south are extremely rare. The summer breeding grounds are tundra with sedges, grass tussocks, dwarf willows, bushes, lichens and pools.[4]
Biology
The Ross's gull breeds in small colonies on tundras and swampy Arctic estuaries, often nesting with other seabirds such as Arctic terns. It lays two to three eggs in a nest on the ground lined with seaweed, grass or moss, often on an island in a little lake. The eggs are olive green with small reddish-brown spots. Incubation takes about three weeks and the chicks fledge in another three weeks. Not all pairs successfully rear their young as predators and bad weather often take their toll.[4]
This bird will eat any suitable small prey such as small fish and crustaceans, and during the winter often feeds on mudflats like a wader. During the breeding season it is largely insectivorous, feeding on beetles and flies.[4]
References
BirdLife International (2020). "Rhodostethia rosea". IUCN Red List of Threatened Species. 2020: e.T22694476A168884321. doi:10.2305/IUCN.UK.2020-3.RLTS.T22694476A168884321.en. Retrieved 11 November 2021.
E. Potapov. 1990. Birds and brave man in the Arctic (Explorers of Polar deserts, Russo-Japanize war and ever mysterious Ross's Gull). – Birds International, v.2 N°3, p. 72-83. [1]
Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 335, 337. ISBN 978-1-4081-2501-4.
"Rhodostethia rosea: Ross's Gull" (in French). Oiseaux.net. Retrieved 2013-12-12.
"Ross's Gull Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-25.
"Zeldzame Ross' meeuw uit Siberië lokt honderden natuurfotografen naar Nieuwpoort". www.vrt.be (in Dutch). Retrieved 2022-01-06.
"Natuurgids Billy kwam speciaal voor Ross' meeuw terug uit vakantie: "Een hels verhaal, maar ik heb hem gezien"".
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