The Canvasback (Aythya valisineria) is a large diving duck. Males have a rust colored head, black breast, and grayish-white body, while the females are a sandy brown color all over. Feeding mostly on seeds, leaves, tubers, snails, and insect larvae, the Canvasback lays 5 to 11 greenish-drab eggs per breeding season.
In winter, lakes and lagoons of northern San Diego County are some
of the Canvasback’s favored sites, especially O’Neill Lake at Camp Pendleton,
Buena Vista Lagoon, and the Santa Margarita River mouth. Unlike many wintering
ducks, which return to the same sites annually, the Canvasback is rather
irregular. It is usually uncommon, yet large flocks appear from time to time
along the San Diego County coast as well as inland lakes.
PHOTO CREDIT: U. S. Fish and Wildlife Service Headquarters