Probable Glaucous-winged x Herring Gull basic 3rd cycle
Baldwin Creek mouth, Santa Cruz, Co., CA
HERRING HEAD & BILL STRUCTURE GOOD FOR BOTH; BICOLORED BILL
ATYPICAL FOR BOTH GWGU AND HERG ADULTS; SUBTLE GWGU
CROSS-BARRING AROUND NECK AND BREAST FAVORS GWGU.
