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They have black primaries with white tips. Immature birds are also similar in appearance to immature herring gulls, with browner plumage than immature ring-billed gulls. Length can range from 46 to 55 cm (18 to 22 in), the wingspan 122–137 cm (48–54 in) [ citation needed ] and body mass can vary from 430 to 1,045 g (0.948 to 2.304 lb).
List of birds of Santa Cruz County, California. The county is in Northern California, located on the California coast, including northern Monterey Bay, and west of the San Francisco Bay and Silicon Valley. It includes the southwestern Santa Cruz Mountains. [1] [2]
It is a white bird with a slender black beak, long black legs and, in the western race, yellow feet. As an aquatic bird, it feeds in shallow water and on land, consuming a variety of small creatures. It breeds colonially, often with other species of water birds, making a platform nest of sticks in a tree, bush or reed bed. A clutch of three to ...
After breeding, birds commonly disperse to central California, and less commonly north as far as British Columbia and south as far as Guatemala. [1] Some birds exhibit strong site fidelity to their nonbreeding territories, including a one-legged gull who resided for 17 years at the Loch Lomond Marina in San Rafael, California .
Samples of San Francisco wastewater tested positive for bird flu; authorities have yet to determine the source.
A western gull in front of the Golden Gate Bridge in San Francisco Common tern Black skimmer. Order: Charadriiformes Family: Laridae. Laridae is a family of medium to large seabirds and includes gulls, terns, and skimmers. Gulls are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and ...
San Francisco health officials announced H5N1 detection in city wastewater last month, after birds at a live market were positively confirmed with the virus. San Francisco is the only California ...
The black-billed magpie is an unmistakable bird within its range. It is a medium-sized bird that measures 45–60 centimeters (18–24 in) from tip to tail. It is largely black, with white scapulars, belly, and primaries, and the wings and tail are an iridescent blue-green. The tail is made up of long, layered feathers, the middle pair of which ...