Calcariidae (Longspurs and Snow Buntings)
- Phylogenetic placement: Passeri: Passerides: Passerida: Emberizoidea
- Distribution: Eurasia and North America
- Number of extant genera: 3
- Number of extant species: 6
Traditional genus-level classification of extant Calcariidae following the AviList checklist v2025. (link) The number of subspecies is given in parentheses. The phylogenetic arrangement is based on Cai et al. (2021), who showed that Calcarius is not monophyletic. As a consequence, ornatus and pictus will have to be transferred to the genus Leptoplectron. The non-monophyly of Calcarius is also shown in the BOW Phylogeny Explorer tree v1.6. (link)
Bibliography [annotated]
Barker FK, Burns KJ, Klicka J, Lanyon SM, and Lovette IJ (2013), Going to extremes: contrasting rates of diversification in a recent radiation of New World passerine
birds, Syst. Biol. 62, 298-320. (abstract) [note: treated all species; found Calcarius to be monophyletic]
Cai T, Wu G, Sun L, Zhang Y, Peng Z, Guo Y, Liu X, Pan T, Chang J, Sun Z, and Zhang B (2021), Biogeography and diversification of Old World buntings (Aves: Emberizidae): radiation in open habitats, J. Avian Biol. 52, e:02672. (free reading) [note: treated all species; found Calcarius to be non-monophyletic]
Klicka J, Zenk RM, and Winker K (2003), Longspurs and snow buntings: phylogeny and biogeography of a high-latitude clade (Calcarius), Mol. Phylogenet. Evol. 26, 165-185. (abstract) [note: treated all species; placed lapponicus together with ornatus + pictus in Calcarius]