Atlapetes tibialis (*)
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
Cladus: 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: 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: Passerellidae
Genus: Atlapetes
Species: Atlapetes tibialis
Name
Atlapetes tibialis (Lawrence, 1864)
Type locality: San José, Costa Rica.
Synonyms
Tachyphonus tibialis (protonym)
Pselliophorus tibialis (Lawrence, 1864)
References
Primary references
Lawrence, G.N. 1867. Descriptions of New Species of Birds of the Families Tanagridae, Cuculidae, and Trochilidae, with a Note on Panterpe insignis. Annals of the Lyceum of Natural History of New York 8: 41–46 DOI: 10.1111/j.1749-6632.1867.tb00291.x BHLReference page. p. 41 BHL
Additional references
Klicka, J., Barker, F.K., Burns, K.J., Lanyon, S.M., Lovette, I.J. & Chaves, J.A. 2014. A comprehensive multilocus assessment of sparrow (Aves: Passerellidae) relationships. Molecular Phylogenetics and Evolution 77: 177-182. DOI: 10.1016/j.ympev.2014.04.025Reference page.
Vernacular names
English: Yellow-thighed Finch
español: Cerquero musliamarillo
suomi: Keltahoususirkku
The yellow-thighed brushfinch (Atlapetes tibialis) is a passerine bird which is endemic to the highlands of Costa Rica and western Panama. Despite its name, it is not a true finch, but rather a member of the family Passerellidae, which also includes American sparrows, juncos and towhees.
This is a common bird in wet mountain forests, second growth, bamboo clumps, scrubby pasture and bushy clearings from 1700 m altitude to the timberline. When not breeding, it can descend to 1200 m on the Caribbean slopes.
The nest, built by the female, is a bulky cup of plant material hidden in coarse grasses, bamboo or a thickly-foliaged tree 0.7-4.6 m above the ground. The female lays two brown-blotched white or pale blue eggs, which she incubates for 12–14 days.
The yellow-thighed brushfinch is a long-tailed species, 18.5 cm long and weighing 31 g. The adult is mainly dark grey, becoming black on the crown, throat, wings and tail, and with an olive tinge to the belly and breast. The bright yellow thighs contrast with the otherwise drab plumage, and give this species its English and scientific names. Young birds have duller, sootier plumage with a brown tone to the underparts, and olive-brown thighs.
The yellow-thighed brushfinch has a heavy metallic tchuk call, and pairs have a twittering tinkling greeting. The male's song consists of high dry notes, tee tididee dee wink wink, or similar phrases.
The yellow-thighed brushfinch feeds at all levels from the treetops to the ground, taking insects and spiders and many berries. It will also squeeze nectar from flowers. It is seen in pairs, family groups or in mixed-species feeding flocks with other small birds such as warblers. It can be very approachable.
References
BirdLife International (2012). "Pselliophorus tibialis". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.
Stiles and Skutch, A Guide to the Birds of Costa Rica, ISBN 0-8014-9600-4
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