Since the first mainland record of the Red-breasted Nuthatch (Sitta canadensis) for Baja California (Ruiz-Campos and Quintana-Barrio 1991), from the Sierra Juárez (32°04'N, 116°05'W; altitude 1370 m) on 15 September 1990 in coniferous forest dominated by Pinus jeffreyi, specimens of this species have continued to be collected in Baja California.