LATE FALL AND EARLY SPRING BIRD OBSERVATIONS FOR MULEGE, BAJA-CALIFORNIA-SUR, MEXICO

Observational data from spring and fall 1996 and spring 1997 for the r egion near Mulege, Baja California Sur, Mexico, are summarized in tabu lar form. In addition, new or noteworthy data for 17 species are annot ated to provide clarification of previously published records. A uniqu ely plumaged bird, too far south for a female American Robin (Turdus m igratorius) in basic plumage and too far north for the endemic ''San L ucas'' Robin (Turdus migratorius confinis) and intermediate in colorat ion between the two, was recorded. Range expansions are documented for several species including European Starling (Sturnus vulgaris), Anna' s Hummingbird (Calypte anna), Western Meadowlark (Sturnella neglecta), White-faced Ibis (Plegadis chichi), and White-fronted Goose (Anser al bifrons). Least Grebes (Tachybaptus dominicus), a species of concern w hich is apparently declining in numbers, and Belding's Yellowthroat (G eothlypis beldingi), a species endemic to Baja California Sur, were ob served in the freshwater marsh during all 3 study periods.