American sparrows are a group of mainly New World passerinebirds, forming the family Passerellidae. American sparrows are seed-eating birds with conical bills, brown or gray in color, and many species have distinctive head patterns.
Although they share the name sparrow, American sparrows are more closely related to Old World buntings than they are to the Old World sparrows (family Passeridae).[1][2] American sparrows are also similar in both appearance and habit to finches, with which they sometimes used to be classified.
Phylogeny based on a 2016 study by Bryson and colleagues.[3][lower-alpha 1]
The genera now assigned to the family Passerellidae were previously included with the buntings in the family Emberizidae. A phylogenetic analysis of nuclear and mitochondrial DNA sequences published in 2015 found that the Passerellidae formed a monophyletic group that had an uncertain relationship to the Emberizidae.[4] Emberizidae was therefore split and the family Passerellidae resurrected.[5][6] It had originally been introduced, as the subfamily Passerellinae, by the German ornithologist Jean Cabanis in 1851.[7]
The International Ornithological Congress (IOC) recognizes these 136 species in the family, distributed among 27 genera in the following sequence.[5] One extinct species, the Bermuda towhee, is included. The North American and South American classification committees of the American Ornithological Society (AOS) do not recognize all of these species, use some different common names, and assign other species to different genera. The AOS also organizes the list in a different sequence.[8][9]
↑Species in three monotypic genera were not sampled in the study: the Sierra Madre sparrow (Xenospiza baileyi), the Zapata sparrow (Torreornis inexpectata) and the tanager finch (Oreothraupis arremonops)[3]
↑ 3.03.1Bryson, R.W.; Faircloth, B.C.; Tsai, W.L.E.; McCormack, J.E.; Klicka, J. (2016). "Target enrichment of thousands of ultraconserved elements sheds new light on early relationships within New World sparrows (Aves: Passerellidae)". The Auk133 (3): 451-458. doi:10.1642/AUK-16-26.1.
↑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". Auk132 (2): 333-348. doi:10.1642/AUK-14-110.1.
↑Chesser, R. Terry; Burns, Kevin J.; Cicero, Carla; Dunn, John L.; Kratter, Andrew W; Lovette, Irby J; Rasmussen, Pamela C.; Remsen, J.V. Jr et al. (2017). "Fifty-eighth supplement to the American Ornithological Society's Check-list of North American Birds". Auk134 (3): 751-773. doi:10.1642/AUK-17-72.1.
↑Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, J. F. Pacheco, C. Ribas, M. B. Robbins, F. G. Stiles, D. F. Stotz, and K. J. Zimmer. Version 11 February 2020. A classification of the bird species of South America. American Ornithological Society. http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved February 12, 2020