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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
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: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Cladus: Telluraves
Cladus: Australaves
Ordo: Passeriformes
Subordo: Passeri
Infraordo: Passerida
Superfamilia: Passeroidea

Familia: Teretistridae
Genus: Teretistris
Species: T. fernandinae – T. fornsi
Name

Teretistris Cabanis, 1855
Typus

Anabates fernandinae Lembeye, 1850 = Teretistris fernandinae

Synonyms

Teretristis [variation]

References
Primary references

Cabanis, J. 1855. In: Dr. J.Gundlach's Beiträge zur Ornithologie Cuba's. Nach Mittheilungen des Reisenden an Hr. Bez.– Dir. Sezekorn in Cassel; von Letzterem zusammengestellt. Mit Zusätzen und Anmerkungen geordnet vom Herausgeber. Journal für Ornithologie 3(18): 465–480. DOI: 10.1007/bf02009761 BHLReference page. Original description p.475 BHL

References

Barker, F. K., Burns, K. J., Klicka, J., Lanyon, S. M., & Lovette, I. J. 2013. Going to extremes: Contrasting rates of diversification in a recent radiation of New World passerine birds. Systematic Biology 62 (2): 298–320. DOI: 10.1093/sysbio/sys094 Full article (PDF)Reference page.
Barker, F.K., Burns, K.J., Klicka, J., Lanyon, S.M. & Lovette, I.J. 2015. New insights into New World biogeography: An integrated view from the phylogeny of blackbirds, cardinals, sparrows, tanagers, warblers, and allies. The Auk 132(2): 333-348. DOI: 10.1642/AUK-14-110.1 Open accessReference page.

The Cuban warblers are a genus, Teretistris, and family, Teretistridae, of birds endemic to Cuba and its surrounding cays. Until 2002 they were thought to be New World warblers, but DNA studies have shown that they are not closely related to that family. The family consists of two species, the yellow-headed warbler and the Oriente warbler. Both species are found in forest and scrub, with the yellow-headed warbler ranging in the west of the island and the Oriente warbler in the east. The Cuban warblers are 13 cm (5.1 in) long and have similar yellow and grey plumage.

The Cuban warblers are insectivores, with beetles forming a large part of the diet. Small reptiles and fruit are also taken. They feed in bushes and trees, in pairs or in small flocks during the non-breeding season, and are often the nucleus species for mixed-species feeding flocks with other birds, particularly migrants from North America.

Taxonomy

The genus Teretistris was long thought to sit in the New World warbler family Parulidae, until a 2002 study examined 25 genera of New World warbler using mitochondrial and nuclear DNA found that six genera were best placed outside the family, including Teretistris.[2] Five of the genera had long been suspected to not sit comfortably inside Parulidae, but before this study there had never been a suggestion that Teretistris did not belong in the New World warbler family.[1]

A follow up study published in 2013 supported the separation of the genus from Parulidae but found it difficult to resolve exactly where it sat with the other nine-primaried songbirds.[3] Their closest relatives may be the wrenthrush, genus Zeledonia, now often treated as a monotypic family, Zeledoniidae.[4] The study's authors nevertheless recommended separating the genus into its own family, Teretistridae.[3] The family was included in the 58th supplement of the American Ornithological Society (AOC) checklist in 2017,[5] and the family has also been accepted by the International Ornithological Congress' (IOC) Birds of the World: Recommended English Names,[6] the Handbook of the Birds of the World's HBW Alive[4] and The Clements Checklist of Birds of the World.[7] These four authorities have also adopted the common name of Cuban warblers for the family.[4][5][6][7] The 2013 Howard and Moore Complete Checklist of the Birds of the World took a different approach, however, and placed the two Cuban warblers with the wrenthrush in the family Zeledoniidae.[8]

The family contains two closely related species, usually treated as a species pair:[9][10]

Yellow-headed warbler (Teretistris fernandinae)
Oriente warbler (Teretistris fornsi)

The yellow-headed warbler is monotypic, meaning it has no described subspecies. In 2000 a subspecies of the Oriente warbler, turquinensis, was described from Pico Turquino, a mountain in the south of the island.[7][8][10] The subspecies has been accepted by some authorities,[6] but one has suggested that further research is required.[11]
Distribution and habitat

The Cuban warblers are, as their name suggests, endemic to Cuba and its surrounding islands and cays. They have an allopatric distribution, with the yellow-headed warbler living in the west of the island and the Oriente warbler living in the east. The yellow-headed warbler is found on the northern coast of the west of the island, as well as the Zapata Peninsula, Guanahacabibes Peninsula and Isla de la Juventud to the south of Cuba. The Oriente warbler has a more discontinuous range along the northern coast of the east of the island, and a more continuous presence in the south of the island in the Oriente region. The recently described subspecies turquinensis is found in the eastern mountains of Oriente. The species is also found on the cays to the north of Cuba, but not any cays to the south. The disjunct populations are thought to be due to a lack of suitable habitat in the east. Where the two species co-occur in the Matanzas Province the Oriente warbler is found along the coast whereas the yellow-headed warbler is found inland.[10]

Both species of Cuban warbler inhabit a range of natural forest with good understory and drier scrubbier habitat, from sea-level up into the mountains of Cuba.[11][12] The Oriente warbler is more likely to live in scrub nearer the coasts, and humid forests higher in hills and mountains.[11]
Description
The forehead and crown of the Oriente warbler is grey, as opposed to the entirely yellow head of the yellow-headed warbler.

The Cuban warblers are around 13 cm (5.1 in) long and weigh between 6–18 g (0.21–0.63 oz). Both are similar in appearance to New World warblers, and have similar plumage to each other. They have grey backs, wings and tails, and yellow faces and throats; the Oriente warbler has a grey crown and forehead and yellow down to the upper belly, with a white lower belly and rear, and the yellow-headed had an entirely yellow head but a grey breast, belly and rear. Both species have a yellow eye-ring.[11][12] The sexes are almost identical, but females have slightly shorter tails. The bills are robust and slightly curved,[10] and blackish-grey to grey.[11][12]
Behaviour
Diet and feeding

Insects form a large part of the diet of the Cuban warblers. Stomach-content analysis of the Oriente warbler showed that beetles formed a large part of its diet, with a smaller part of its diet being composed of true bugs (Hemiptera) and moths and butterflies. Both species are also reported to take small lizards; the Oriente warbler has also been reported eating small fruit.[11][12] The yellow-headed warbler typically feeds in the understorey and mid canopy parts of the forest, a form of niche partitioning with the olive-capped warbler which more usually forages in the higher canopy,[13] whereas the Oriente warbler feeds at higher levels in the canopy, above 5 m (16 ft) in the morning, before moving to feed closer to the ground in the evening.[11] It has been suggested that this shift may relate to the changes in temperature over the day; as the day heats up foraging birds move lower where it may be cooler.[10]

The Cuban warblers are often found in flocks of up to six birds in the non-breeding season.[11][12] These small flocks often serve as the nucleus of mixed-species feeding flocks of native species and in particular overwintering migrants from North America. The yellow-headed warbler was found in 82% of mixed species flocks observed in its range, and the Orinete warbler in 42% of its potential flocks (although the sample size was much smaller).[14]
Breeding

The nesting biology of the Cuban warblers has not been documented in detail. Both species are seasonal breeders, with a nesting season ranging from March to July and an egg-laying period from March to May.[11][12] The nest of the Oriente warbler is a simple unlined cup constructed of small vines, roots, moss and feathers. The cup measures 40 to 55 mm (1.6–2.2 in) in diameter, and is 35 mm (1.4 in) high with a depth of 23 mm (0.91 in). The nests are usually placed within 1 m (3.3 ft) on a branch usually concealed among epiphytes such as Tillandsia moss or parasitic plants.[10] The nest of the yellow-headed warbler is also a cup, made of similar materials and grass, placed close to the ground in low vegetation.[12]
References

Curson, J; Bonan, A (2019). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "New World Warblers (Parulidae)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 14 February 2019.
Lovette, I. J.; Bermingham, E. (2002). "What is a wood-warbler? Molecular characterization of a monophyletic Parulidae". The Auk. 119 (3): 695. doi:10.1642/0004-8038(2002)119[0695:WIAWWM]2.0.CO;2.
Barker, F. Keith; Burns, Kevin J.; Klicka, John; Lanyon, Scott M.; Lovette, Irby J. (March 2013). "Going to Extremes: Contrasting Rates of Diversification in a Recent Radiation of New World Passerine Birds". Systematic Biology. 62 (2): 298–320. doi:10.1093/sysbio/sys094. PMID 23229025.
del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo, eds. (2019). "Cuban Warblers (Teretistridae)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 14 February 2019.
Chesser, R. Terry; Burns, Kevin J.; Cicero, Carla; Dunn, Jon L.; Kratter, Andrew W.; Lovette, Irby J.; Rasmussen, Pamela C.; Remsen, J. V.; Rising, James D.; Stotz, Douglas F.; Winker, Kevin (2017). "Fifty-eighth supplement to the American Ornithological Society's". The Auk. 134 (3): 751–773. doi:10.1642/AUK-17-72.1.
Gill, Frank; Donsker, David, eds. (2019). "Enigmatic Oscines". World Bird List Version 8.2. International Ornithologists' Union. Retrieved 14 February 2019.
Clements, J; Schulenberg, T; Iliff, M; Roberson, D; Fredericks, T; Sullivan, B; Wood, C (2018). "The eBird/Clements checklist of birds of the world: v2018". The Cornell Lab of Ornithology. Retrieved 19 February 2019.
Dickinson, Edward; Christidis, Les (2014). "The Howard and Moore Complete Checklist of the Birds of the World version 4.0 (Downloadable checklist)". The Howard and Moore Complete Checklist of the Birds of the World. Retrieved 19 February 2019.
"ITIS Report: Teretistris". Integrated Taxonomic Information System. Retrieved 3 June 2012.
Garrido, O. H. (2000). "A new subspecies of Oriente Warbler Teretistris fornsi from Pico Turquino, Cuba, with ecological comments on the genus" (PDF). Cotinga. 14: 88–93.
Curson, J (2019). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "Oriente Warbler (Teretistris fornsi)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 17 February 2019.
Curson, J (2019). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "Yellow-headed Warbler (Teretistris fernandinae)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 17 February 2019.
Plasencia Vázquez, Alexis Herminio; Torrens, Yatsunaris Alonso; Hernández Martínez, Fernando Ramón (2009). "Distribución vertical de las aves Dendroica pityophila y Teretistris fernandinae (Passeriformes: Parulidae) en Pinar del Río, Cuba" (PDF). Revista de Biología Tropical (in Spanish). 57 (4): 1263–1269.
Hamel, Paul B.; Kirkconnell, Arturo (2005). "Composition of mixed-species flocks of migrant and resident birds in Cuba" (PDF). Cotinga. 24: 28–34.

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