White-browed gnatcatcher

White-browed gnatcatcher
Preserved specimen at Naturalis Biodiversity Center
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Polioptilidae
Genus:	Polioptila
Species:	P. bilineata
Binomial name
Polioptila bilineata (Bonaparte, 1850)

White-browed Gnatcatcher

The white-browed gnatcatcher (Polioptila bilineata) is a species of bird in the gnatcatcher family Polioptilidae. It is native to central and South America.

This species was formerly considered a subspecies of the tropical gnatcatcher (Polioptila plumbea).

Taxonomy

The white-browed gnatcatcher was formally described in 1850 by the French naturalist Charles Lucien Bonaparte and given the binomial name Sylvia bilineata. Bonaparte specified the locality as Cartagena, a city on the Caribbean coast of Colombia. ^{[1] [2]} This species was formerly considered as a subspecies of the tropical gnatcatcher (Polioptila plumbea). The white-browed gnatcatcher was split from the tropical gnatcatcher based on morphology and phylogenetic data. ^{[3] [4] [5]}

Five subspecies are recognised: ^[4]

• Polioptila bilineata brodkorbi Parkes, 1979 – south Mexico to north Costa Rica
• Polioptila bilineata superciliaris Lawrence, 1861 – north-central Costa Rica to north Colombia
• Polioptila bilineata cinericia Wetmore, 1957 – Coiba (island off south Panama)
• Polioptila bilineata bilineata (Bonaparte, 1850) – northwest Colombia to northwest Peru
• Polioptila bilineata daguae Chapman, 1915 – west-central Colombia

References

1. Bonaparte, Charles Lucien (1850). Conspectus Generum Avium (in Latin). Vol. 1. Leiden: E.J. Brill. p. 316.
2. Mayr, Ernst; Paynter, Raymond A. Jr, eds. (1964). Check-list of Birds of the World. Vol. 10. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 452.
3. Smith, B.T.; Bryson, R.W. Jr; Mauck, W.M.; Chaves, J.; Robbins, M.B.; Aleixo, A.; Klicka, J. (2018). "Species delimitation and biogeography of the gnatcatchers and gnatwrens (Aves: Polioptilidae)" (PDF). Molecular Phylogenetics and Evolution. 126: 45–57. doi:10.1016/j.ympev.2018.03.012.
4. 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.
5. Chesser, R.T.; Billerman, S.M.; Burns, K.J.; Cicero, C.; Dunn, J.L.; Hernández-Baños, B.E.; Kratter, A.W.; Lovette, I.J.; Mason, N.A.; Rasmussen, P.C.; Remsen, J.V.J.; Stotz, D.F.; Winker, K. (2021). "Sixty-second Supplement to the American Ornithological Society's Check-list of North American Birds". Ornithology (ukab037). doi: 10.1093/ornithology/ukab037 .