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Nightjars are medium-sized nocturnal birds that usually nest on the ground. They have long wings, short legs, and very short bills. Most have small feet, of little use for walking, and long pointed wings. Their soft plumage is cryptically colored to resemble bark or leaves. Common nighthawk, Chordeiles minor; Chuck-will's-widow, Antrostomus ...
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 ...
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.
It is a colonial nesting species that builds a shallow nest using marsh vegetation and often competes with gulls for nesting sites. [11] [12] [13] A breeding colony may vary in numbers from a few couples to a thousand individuals. [11] In many occasions, Forster's tern will share nesting sites with the yellow-headed blackbird. [12]
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).
The game commission believes since 2012, 21 common tern nests have been started there but failed. Brian Whipkey is the outdoors columnist for USA TODAY Network sites in Pennsylvania.
The Elegant tern also differs in a slightly longer, slenderer bill, while Chinese crested tern differs in a black tip to the bill and Sandwich tern a black bill with a yellow tip. [7] Juvenile lesser crested terns resemble same-age Sandwich terns, but with a yellow-orange bill, and paler overall, with only faint dark crescents on the mantle ...
The greater crested tern is a large tern with a long (5.4–6.5 cm or 2.1–2.6 in) yellow bill, black legs, and a glossy black crest that is noticeably shaggy at its rear. The breeding adult of the nominate subspecies T. b. bergii is 46–49 cm (18–19.5 in) long, with a 125–130 cm (49–51 in) wing-span; weight 325–397 grams (11.5–14.0 ...