Pelicans

These are brown pelicans or Pelecanus occidentalis. They are highly visible along the California coast and are marvelously graceful fliers. Here is an extended description of the birds from Wikipedia: Brown pelican.

The brown pelican is the smallest of the eight species of pelican, although it is large compared to most other shorebird families. It is 106–137 cm (42–54 in) in length, weighs from 2.75 to 5.5 kg (6.1 to 12.1 lb) and has a wingspan from 1.83 to 2.5 m (6.0 to 8.2 ft). Through most of its range, the brown pelican is an unmistakable bird. Like all pelicans, this species has a very large bill, 28 to 34.8 cm (11.0 to 13.7 in) long in this case, with a gular pouch on the bottom for draining water when it scoops out prey. The head is white but often gets a yellowish wash in adult birds. The bill is grayish overall in most birds, though breeding birds become reddish on the underside of the throat. The back, rump, and tail are streaked with gray and dark brown, sometimes with a rusty hue. In adult pelicans, the breast and belly are a blackish-brown and the legs and feet are black. The juvenile is similar but has a brownish-gray neck and white underparts. White pelicans are very small.