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Dendragapus obscurus

Dendragapus obscurus

Superregnum: Eukaryota
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
Cladus: 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: Euornithes
Cladus: Ornithuromorpha
Cladus: Ornithurae
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Pangalloanserae
Cladus: Galloanseres
Ordo: Galliformes

Familia: Phasianidae
Subfamilia: Tetraoninae
Genus: Dendragapus
Species: Dendragapus obscurus
Subspecies: D. o. obscurus - D. o. oreinus - D. o. pallidus - D. o. richardsoni
Name

Dendragapus obscurus (Say, 1823)
References

Exped.RockyMt.[James]Phila.ed 2 p. 14,note
Vernacular names
Deutsch: Felsengebirgshuhn
English: Dusky Grouse
magyar: Kék fajd
日本語: アオライチョウ
lietuvių: Melsvasis tetervinas
svenska: Gråjärpe

The dusky grouse (Dendragapus obscurus) is a species of forest-dwelling grouse native to the Rocky Mountains in North America.[2][3] It is closely related to the sooty grouse (Dendragapus fuliginosus), and the two were previously considered a single species, the blue grouse.[2][3][4]

Description

Adults have a long square tail, gray at the end. Adult males are mainly dark with a purplish throat air sac surrounded by white, and a yellow to red wattle over the eye during display. Adult females are mottled brown with dark brown and white marks on the underparts.[3]
Distribution and habitat

Their breeding habitat is the edges of conifer and mixed forests in mountainous regions of western North America, from southeastern Alaska and Yukon south to New Mexico.[3] Their range is closely associated with that of various conifers. Their nest is a scrape on the ground concealed under a shrub or log.

Migration

They are permanent residents but move short distances by foot and short flights to denser forest areas in winter, with the odd habit of moving to higher altitudes in winter.[2]

Diet

These birds forage on the ground, or in trees in winter. In winter, they mainly eat fir and douglas-fir needles, occasionally also hemlock and pine needles; in summer, other green plants (Pteridium, Salix), berries (Gaultheria, Mahonia, Rubus, Vaccinium), and insects (particularly ants, beetles, grasshoppers) are more important. Chicks are almost entirely dependent on insect food for their first ten days.[2]

Breeding

Males sing with deep hoots on their territory and make short flapping flights to attract females. Females leave the male's territory after mating.

References

BirdLife International (2016). "Dendragapus obscurus". IUCN Red List of Threatened Species. 2016: e.T22734690A95095102. doi:10.2305/IUCN.UK.2016-3.RLTS.T22734690A95095102.en. Retrieved 12 November 2021.
del Hoyo, J., Elliott, A., & Sargatal, J., eds. (1994). Handbook of the Birds of the World 2: 401-402. Lynx Edicions, Barcelona ISBN 84-87334-15-6.
Sibley, D. (2000). The Sibley Guide to Birds. Knopf. p. 143. ISBN 0-679-45122-6.
Banks, R. C.; Cicero, C.; Dunn, J. L.; Kratter, A. W.; Rasmussen, P. C.; Remsen, J. V. Jr.; Rising, J. D.; Stotz, D. F. (2006). "Forty-seventh Supplement to the American Ornithologists' Union Check-list of North American Birds" (PDF). The Auk. 123 (3): 926–936. doi:10.1642/0004-8038(2006)123[926:FSTTAO]2.0.CO;2. Retrieved 2007-09-16.

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