The Eared Grebe (Podiceps nigricollis) is the most widespread and abundant grebe worldwide, with a distribution that includes Asia, Africa, Europe, and North America. In North America, the species breeds widely through the western and central United States and southern Canada. There is also a small, disjunct, and poorly known breeding population in the highlands of the volcanic belt of central Mexico (Wilson et al. 1988). Away from this population, breeding in Mexico is sporadic, with scattered records from Chihuahua, Nayarit, Jalisco, and Puebla (Dickerman 1969, Williams1982). A former breeding population in Baja California had been presumed extirpated (Huey 1928, Cullen et al. 1999), but recently breeding has been documented annually in Mexicali (Erickson et al. 2011, Mellink and Hinojosa-Huerta 2018). In Sonora, there are infrequent summer records but no previous breeding records (Russell and Monson 1998; eBird.org).