South Hills crossbill
|South Hills Crossbill|
The South Hills Crossbill (proposed scientific name Loxia sinesciuris) is a passerine bird in the family Fringillidae. It's endemic to the South Hills and Albion Mountains in southern Idaho. South Hills Crossbill rarely interbreeds with other call types that move into the South Hills of Idaho yearly, and can be considered to represent a distinct species  via ecological speciation.
It has been proposed as a separate species, but the American Ornithologists' Union failed to find consensus on the issue and thus the South Hills Crossbill is still considered a subtype of the Red Crossbill.
- Benkman, C.W. (2010). "Diversifying Coevolution between Crossbills and Conifers". Evo Edu Outreach 3: 47–53. doi:10.1007/s12052-009-0190-8.
- Benkman, C.W., Smith, J.W., Keenan, P.C., Parchman, T.L. & Santisteban, L. 2009. "A New Species of the Red Crossbill (Fringillidae: Loxia) From Idaho." The Condor 111 (1): 169-176. Full article
- Smith J.W.; Benkman C.W. (2007). "A coevolutionary arms race causes ecological speciation in crossbills". American Naturalist 169 (4): 455–65. doi:10.1086/511961. PMID 17273981.
- "2009-A-10:Recognize a new species of Red Crossbill, Loxia sinesciurus (Benkman)". American Ornithologists' Union.
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