eWestern Birds

The Quarterly Journal of Western Field Ornithologists

Vol. 47, No. 2
May 2016
Western Field Ornithologists


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Allen’s Hummingbird Nests in Mexico: Expansion of Selasphorus sasin sedentarius into Baja California
Richard A. Erickson

ABSTRACT: Subspecies Selasphorus sasin sedentarius of Allen’s Hummingbird has been expanding its range in southern California since the 1960s. Nesting near Tijuana, Baja California, in 2014 and 2015 established the first nesting records for Mexico. The species is likely to expand farther into Mexico, and some local displacement of Anna’s Hummingbird (Calypte anna) may be expected.

Download—Allen’s Hummingbird Nests in Mexico: Expansion of Selasphorus sasin sedentarius into Baja California