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The western population, the California least tern, was listed as an endangered species in 1972 with a population of about 600 pairs.With aggressive management, mainly by the exclusion of humans via fencing, the Californian population has rebounded in recent years to about 4500 pairs, a marked increase from 582 pairs in 1974 when census work began, though it is still listed as an endangered ...
Ring-billed gull Forster's tern. Order: Charadriiformes Family: Laridae. Laridae is a family of medium to large seabirds and includes gulls, terns, kittiwakes, and skimmers. They are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet.
The yellow-billed, large-billed, and black-fronted terns breed only on rivers, and common, least and little terns also sometimes use inland locations. The marsh terns, Trudeau's tern and some Forster's terns nest in inland marshes. The black noddy and the white tern nest above ground level on cliffs or in
Terns are generally long-lived birds, with several species known to live in excess of 30 years. Skimmers are a small family of tropical tern-like birds. They have an elongated lower mandible which they use to feed by flying low over the water surface and skimming the water for small fish.
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Nesting colonies are very common among seabirds on cliffs and islands. Nearly 95% of seabirds are colonial, [3] leading to the usage, seabird colony, sometimes called a rookery. Many species of terns nest in colonies on the ground. Herons, egrets, storks, and other large waterfowl also nest communally in what are called heronries.
Laughing gull Ring-billed gull Least tern. Laridae is a family of medium to large seabirds and includes gulls, terns, kittiwakes, and skimmers. They are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Black-legged kittiwake, Rissa tridactyla (A) Sabine's gull, Xema sabini (A)
The refuge is a nesting area for brown pelicans, American white pelicans, great egrets, laughing gulls, Sandwich terns, least terns, American oystercatchers, reddish egrets, roseate spoonbills, snowy egrets, tricolored herons and diamondback terrapins (Malaclemys terrapin).