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
Cladus: Columbimorphae
Ordo: Columbiformes
Familia: Columbidae
Subfamilia: Treroninae
Genus: Alectroenas
Species: Alectroenas sganzini
Subspecies: A. s. minor - A. s. sganzini
Name
Alectroenas sganzini (Bonaparte, 1854)
References
Comptes Rendus Hebdomadaire des Séances de l'Académie des Sciences [Paris] 39 p.880
Vernacular names
Deutsch: Komoren-Fruchttaube
English: Comoro Blue-pigeon
español: Paloma azul de las Comores
suomi: Komoriensinikyyhky
français: Founingo des Comores
Nederlands: Comoren-blauwe duif
پنجابی: کومورو نیلا کبوتر
svenska: Komorblåduva
Tiếng Việt: Bồ câu lam Comoros
The Comoros blue pigeon (Alectroenas sganzini) is a species of bird in the family Columbidae. It is endemic to the Comoros and the coralline Seychelles. It is rated as a species of near threatened on the International Union for Conservation of Nature Red List of Endangered Species.
Description
The Comoros blue pigeon measures about 27 centimetres (11 in) in length. The male weighs from 134 to 158 g (4.7 to 5.6 oz), and the female weighs about 117 grams (4.1 oz). It has a silvery gray head, neck, and upper breast. The neck feathers are silvery white in colour,[2] and are very long and deeply partitioned.[3] The beak is greenish or yellowish grey, and has a pale yellow or greenish white tip. It has black lower underparts. The lower part of the breast is shiny violet-blue, and the belly and flanks are more greenish blue in colour.[2]
Distribution and habitat
The Comoros blue pigeon is endemic to the Comoros and the coralline Seychelles.[2] Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and subtropical or tropical moist montane forests.[1] It is found at elevations ranging from 500 to 1,500 m (1,600 to 4,900 ft) above sea level.[3]
Behaviour
The Comoros blue pigeon is sometimes solitary, but may occur in groups of up to 15 individuals. These often fly about 10 m (30 ft) above the water between islands in the Aldabra group, making regular journeys in one direction in the mornings and back again in the evenings. Their flight is fast, interspersed with wing claps. They have a habit of perching high in a tree in full sun and raising one wing to expose it to the sun.[2] They are arboreal, fruit-eating birds which seem to avoid landing on the ground; however, small stones found in their crop seem to indicate that they do sometimes descend to the earth.[2]
Status and conservation
As of 2017, the Comoros blue pigeon has been rated as a species of near threatened on the IUCN Red List of Endangered Species. This is because although it has a restricted distribution, its range size is considered to be more than 20,000 km2 (7,700 mi2). Despite a decreasing or fluctuating range, the area of occurrence is above the criterion to warrant it a vulnerable rating. Although its population has not been determined, it is thought to be above 10,000. Also, even though its population is decreasing, the rate of decline is thought to be less than 30% over ten years or three generations and thus is below the vulnerable criteria. It is reportedly extinct in some areas, commonly found in others, and extinct on many small islands.[1]
References
BirdLife International (2017). "Alectroenas sganzini". IUCN Red List of Threatened Species. 2017: e.T22691594A118620252. doi:10.2305/IUCN.UK.2017-3.RLTS.T22691594A118620252.en. Retrieved 12 November 2021.
Safford, Roger; Hawkins, Frank (2013). The Birds of Africa: Volume VIII: The Malagasy Region: Madagascar, Seychelles, Comoros, Mascarenes. A&C Black. pp. 509–510. ISBN 9780713665321.
Baptista, L.F.; Trail, P.W.; Horblit, H.M.; Boesman, P. (2017). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "Comoro Blue-pigeon (Alectroenas sganzini)". Handbook of the Birds of the World Alive. Lynx Edicions. Archived from the original on 2017-07-14. Retrieved 2017-09-19.
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