Spizella taverneri The timberline sparrow (Spizella breweri taverneri) is a taxonomically controversial American sparrow.

Usually treated as a subspecies of Brewer's sparrow, it is considered a distinct species Spizella taverneri by some authorities.[who?]

While the timberline sparrow recognizably differs in some details, there is little reproductive isolation between the taxa.

[citation needed] When it was still considered a species, it was listed as being of least concern by the IUCN.

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