Before the 1960s, Anna’s Hummingbird (Calypte anna) nested only in California and northwestern Baja California (Clark and Russell 2012). Today, the species has expanded its breeding range dramatically north into Oregon, Washington, and Vancouver Island, British Columbia, as well as eastward into southern Arizona, with one instance of breeding recorded in west Texas (Williams 1976). Clark and Russell (2012) attributed the range expansion over the last 80 years to adaptation to human habitation, specifically to gardens and the “widespread use of feeders.” The breeding range now appears to be expanding eastward into Idaho, as evidenced by Bassett’s documentation of gravid Anna’s Hummingbirds there.