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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
Cladus: Telluraves
Cladus: Australaves
Ordo: Passeriformes
Subordo: Passeri
Infraordo: Passerida
Superfamilia: Certhioidea

Familia: Polioptilidae
Genera: Microbates - Polioptila - Ramphocaenus

Name

Polioptilidae Baird, 1858
References

LeCroy, M., 2005: Type specimens of birds in the American Museum of Natural History. Part 6. Passeriformes: Prunellidae–Polioptilidae. Bulletin of the American Museum of Natural History 292: 1–132. Abstract: DOI: 10.1206/0003-0090(2005)292[0001:TSOBIT]2.0.CO;2.

Vernacular names
Deutsch: Mückenfänger
suomi: Sääskikertut
中文: 蚋莺科

The Gnatcatchers are a family of small passerine birds called Polioptilidae. The 21 species occur in North and South America (except for the far south and the high Andean regions). Most species of this mainly tropical and subtropical group are resident, but the blue-grey gnatcatcher of the United States and southern Canada migrates south in winter. They are close relatives of the wrens.[1]

Description

These dainty birds are intermediate between Old World warblers and wrens in their structure and habits, moving restlessly through foliage seeking insects. The gnatcatchers are mainly soft bluish grey in colour, and have the typical insectivore's long sharp bill. Many species have distinctive black head patterns (especially males) and long, regularly cocked, black-and-white tails. The skulking gnatwrens are browner, more thickset, and with proportionally shorter tails and longer bills.[1]
Distribution and habitat

They are distributed from North to South America, with the exception of the far south and high Andean regions. Gnatwrens typically occur in the undergrowth of dense, often humid, forest, while gnatcatchers, depending on the species involved, occur in anything from dry scrubby habitats (e.g. the California gnatcatcher) to the canopy of humid Amazonian forest (e.g. the Guianan gnatcatcher). The North American species nest in bushes or trees, but the breeding behavior of several of the Neotropical species is essentially unknown.[1]
Taxonomy and systematics

Certhioidea

Tichodromidae: wallcreeper

Sittidae: nuthatches

Certhiidae: treecreepers

Polioptilidae: gnatcatchers

Troglodytidae: wrens



Relatives of the gnatcatchers in the superfamily Certhioidea.[2]

A species new to science, the critically endangered Iquitos gnatcatcher Polioptila clementsi, was first described in 2005.[3] This species is a member of the Guianan gnatcatcher Polioptila guianensis complex, which recently has been proposed split into three species (four with the Iquitos gnatcatcher), but not all authorities have accepted this (e.g. SACC). Furthermore, other groups should possibly be split, notably the tropical gnatcatcher Polioptila plumbea and masked gnatcatcher Polioptila dumicola complexes, but at present scientific papers on these matters are lacking.

The family contains 21 species divided into 3 genera:[4]

Ramphocaenus (2 species) – gnatwrens
Microbates (2 species) – gnatwrens
Polioptila (17 species) – gnatcatchers

References

Atwood, J. & Lerman, S. (2006) Family Polioptilidae (Gnatcatchers). pp. 350–377 in: del Hoyo, J., A. Elliott, and D. Christie. eds (2006). Handbook of Birds of the World Vol. 11. Old World Flycatchers to Old World Warblers. Lynx Edicions, Barcelona. ISBN 978-84-96553-06-4
Oliveros, C.H.; et al. (2019). "Earth history and the passerine superradiation". Proceedings of the National Academy of Sciences of the United States. 116 (16): 7916–7925. doi:10.1073/pnas.1813206116. PMC 6475423. PMID 30936315.
Whitney, B. & Alonso, A. (2005) A new species of gnatcatcher from the white-sand forests in northern Amazonian Peru with revision of the Polioptila guianensis complex. Wilson Bull. 117(2): 113-210.
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Dapple-throats, sugarbirds, fairy-bluebirds, kinglets, Elachura, hyliotas, wrens, gnatcatchers". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 3 June 2021.

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