/ December 6, 2020/ Uncategorized

in southern California,[9] as well as shiner perch, and small crustaceans elsewhere. In courtship, male (carrying fish in bill) flies upward, followed by female, then both glide down. Feeding behavior involves hovering and diving for small fish and aquatic crustaceans, and occasionally skimming the water surface for insects. (St. Augustine, Florida). Weight: Approximately 1 ounce. Leaves North America and northern Mexico entirely in winter, moving to tropical waters as far south as Brazil. We now think the tern should be listed as "threatened." The head is white, with a black cap and line through the eye to the base of the bill, and a small white forehead patch above the bill; in winter, the white forehead is more extensive, with a smaller and less sharply defined black cap. Least terns arrive in Nebraska from their wintering grounds in Central and South America between mid-May and early June. This species winters from the Gulf Coast and Central America south to Peru … Incubation is by both sexes; female may do more in early stages, male more later. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too. Usually hovers before plunging into water for tiny prey; does more hovering than most terns. Elegant Tern. The birds are opportunistic and tend to select any small fish within a certain size range. The least tern's breeding range includes coastal areas in California and along the eastern seaboard from Maine to Florida, as well as the Mississippi River area. The western population, the California least tern, was listed as an endangered species in 1972 with a population of about 600 pairs. Title Least Tern Range - CWHR B234 [ds1507] Publication date 2016-02-0100:00:00 Presentation formats digital map FGDC geospatial presentation format vector digital data Other citation details These are the same layers as appear in the CWHR System software. It hovers until spotting prey, and then plunges into the water without full submersion to extract meal. Black Tern. Overwhelmed and Understaffed, Our National Wildlife Refuges Need Help. Breeding Range: Interior Least Terns' breeding range stretches across the interior of the United States along the Mississippi, Missouri, and Rio Grande Rivers and their tributaries. Buff to pale green, blotched with black, brown, gray. [7] In the San Francisco Bay region, breeding typically takes place on abandoned salt flats. Endangered. Status: State threatened. Both parents feed young. The least tern has a nearly worldwide distribution. Our email newsletter shares the latest programs and initiatives. Least tern management begins in May when nesting areas on beaches are fenced and signed. Subspecific information 3 subspecies Sternula antillarum antillarum (e and s USA to Honduras, Caribbean, n South America) Sandwich Tern. It is migratory, wintering in Central America, the Caribbean and northern South America. The least tern arrives at its breeding grounds in late April. How Bird-Friendly Are Your Holiday Decorations? Usually hovers before plunging into water for tiny prey; does more hovering than most terns. Browse Species in This Family. Wingspan: 20 inches. They migrate south beginni… Other close relatives include the yellow-billed tern and Peruvian tern, both from South America. Adults are known to wet themselves and shake off water over the eggs when arriving at the nest. Length: 8.5-9.5 inches. Gull-billed Tern. Least Tern Photo: Donald Mullaney . They winter along coastal areas of Central and South America and the Caribbean Islands, but not a lot is known about their wintering areas. Both parents feed young. The aptly named Least Tern—it’s really small—has been bedeviled for decades by habitat degradation. It is closely related to, and was formerly often considered conspecific with, the little tern of the Old World. While numbers have gradually increased with its protected status, it is still vulnerable to predators, natural disasters or further disturbance by humans. Migratory Behavior. Threats include egg and fledgling predators, high tides and recreational use of nesting beaches. Delisting the least tern can be considered when the interior population reaches 7,000 and is stable for 10 years, as verified by four censuses. Nests are situated on barren to sparsely vegetated places near water, normally on sandy or gravelly substrates. [2] It has occurred as a vagrant to Europe, with one record in Great Britain. Formerly a common breeding bird throughout most of its current range, the interior least tern is now extremely limited in both numbers and distribution. [3][4][14], 10.2305/IUCN.UK.2016-3.RLTS.T22694673A93462098.en, "Subspecific Status and Population Genetic Structure of Least Terns (Sternula antillarum) Inferred by Mitochondrial DNA Control-Region Sequences and Microsatellite DNA", California Least Tern Breeding Survey 2009 Season, 10.1675/1524-4695(2006)29[501:RSBLTI]2.0.CO;2, Tern Colony: an individual-based model of Least Tern reproduction, https://en.wikipedia.org/w/index.php?title=Least_tern&oldid=970892885, Creative Commons Attribution-ShareAlike License, An unknown subspecies was found in 2012 nesting on the Big Island of Hawaii, This page was last edited on 3 August 2020, at 00:44. Where the surface is hard, this species may use an artificial indentation (such as a deep dried footprint) to form the nest basin. Tiny, noticeably smaller than other terns, with quick flicking wingbeats. In any case, the bulk of the population has left the breeding grounds by the end of August. The most common prey recently for both chicks and adults are silversides smelt (Atherinops spp.) Bald Eagle. Your support helps secure a future for birds at risk. With aggressive management, mainly by 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 subspecies. Population Status and Trend - The global population for the least tern is estimated at 65,000 – 70,000 individuals (BirdLife International 2010). Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures. National Audubon Society However, Least Terns in some parts of the east are now nesting successfully on gravel roofs near the coast. The breeding colonies are not dense and may appear along either marine or estuarine shores, or on sandbar islands in large rivers, in areas free from humans or predators. That rating was downgraded to Least Concern in 2004 due the size of the Least Tern population. A least tern lying just below the surface of the sand is probably on its nest. In breeding plumage the species is characterized by a black cap and stripe through the eye that contrast sharply with a white forehead (Thompson et al. Text © Kenn Kaufman, adapted from Young birds can fly at age four weeks. Age at first flight about 19-20 days; young may remain with parents another 2-3 months. However, Least Terns in some parts of the east are now nesting … Courtship typically takes place removed from the nesting colony site, usually on an exposed tidal flat or beach. The interior subspecies, with a current population of about 7000 pairs, was listed as an endangered subspecies in 1985 (estimated 1000 breeding pairs), due to loss of habitat caused by dams, reservoirs, channelization, and other changes to river systems. Terns range in size from the least tern, at 23 cm (9.1 in) in length and weighing 30–45 g (1.1–1.6 oz), to the Caspian tern at 48–56 cm (19–22 in), 500–700 g (18–25 oz). Least Tern: Scientific (Sternula antillarum) Order: CHARADRIIFORMES: Family (Latin) Laridae: Family (English) Gulls, Terns, Skimmers: Other name(s) Breeding Regions: NA, MA: Breeding Range Subregions: widespread: Nonbreeding Range Subregions: n SA coast: Countries (BETA)map Help power unparalleled conservation work for birds across the Americas, Stay informed on important news about birds and their habitats, Receive reduced or free admission across our network of centers and sanctuaries, Access a free guide of more than 800 species of North American birds, Discover the impacts of climate change on birds and their habitats, Learn more about the birds you love through audio clips, stunning photography, and in-depth text. This species is in danger of extinction throughout all or a significant portion of its range. Diet varies with season and location; mostly small fish, crustaceans, and insects, also some small mollusks and marine worms. Least Tern Sterna antillarum. The Interior least tern nesting population encompasses hundreds of colonies in 18 States throughout the Interior Basin, from Montana southward through North Dakota, South Dakota, Nebraska, Colorado, Iowa, Kansas, Missouri, Illinois, Indiana, and Kentucky to eastern New Mexico, Oklahoma, Arkansas, Tennessee, Texas, Louisiana, and … 1-3, perhaps rarely more. Caspian Tern. The Interior Least Tern is primarily a fish-eater, feeding in shallow waters of rivers, streams, and lakes. Good Turns for Least Tern. In the southeastern United States, many breeding sites are on white gravel rooftops. Least terns are migratory and only occur in Oklahoma only during the breeding season. Most commonly the clutch size is two or three, but it is not rare to consist of either one or four eggs. The upper parts are a fairly uniform pale gray, and the underparts white. Common Tern. Batiquitos Lagoon, a breeding site in San Diego County, California, Nesting pair on the Missouri River in South Dakota. For the second time in three years, Mississippi’s Big Sunflower River has been recognized as one of the nation’s most endangered rivers. During migration, they occasionally occur in the Lower South Platte River Basin, and less frequently on the west slope. Montana, which is at the western edge of the range, has a recovery goal of 50 birds. Least Tern (Sternula antillarum) is a species of bird in the Laridae family. The eggs are speckled and generally blend well with the sandy surface. Habitat: Broad, sandy, vegetation-free beaches usually located close to an estuary. On inland rivers, fluctuating water levels (from releases from major dams) often flood out nesting sites on sandbars. Are the Trump Administration's Environmental Rollbacks Built to Last? Its small size—not quite the size of a robin—yellow bill, and triangular white patch on its forehead distinguish it from other terns found in North Carolina. Hundreds of secretive Clapper Rails also mysteriously found on Mississippi beaches. The nests are very shallow and minimally scooped out. Many spend their whole first year in their wintering area. Mating pair at Sunset Beach, North Carolina, The mating sequence of a pair of least terns processed into one image. Habitat in Nonbreeding Range. Audubon is committed to working with all partners as well as state and federal agencies to continue protecting this bird and the places it needs, today and tomorrow.” ### Because most of the Least Tern's decline in California seems to have resulted from disturbance … Let us send you the latest in bird and conservation news. That would mean we are concerned about it, but we don't think it is about to go extinct. The least tern (Sternula antillarum) is a species of tern that breeds in North America and locally in northern South America. The prior rating for the Least Tern was Lower Risk. It’s the least you can do. and anchovy (Anchoa spp.) Bird ID … This least tern is on the nest. Populations are endangered in many areas because of human impacts on nesting areas, especially competition for use of beaches. Our smallest tern. Nest site is on open ground (or on gravel roof). Sometimes dips down to take prey from surface of water or land, and may catch insects in flight. Sea beaches, bays, large rivers, salt flats. Several populations are endangered. We protect birds and the places they need. Membership benefits include one year of Audubon magazine and the latest on birds and their habitats. Nests in colonies, sometimes in isolated pairs. This is to let people give us reasons why they agree or disagree.The species' population has increased from 600 in 1973 to roughl… Life Expectancy: 15 years of age. The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation. Incubation period 20-25 days. Protecting shorebirds in habitats especially vulnerable to development and climate threats, Restoring vital coastal wetlands for colonial and beach-nesting birds. Along coast generally where sand beaches close to extensive shallow waters for feeding. The Least Tern has a range of nearly half a million square kilometers. Least Tern: Scientific (Sternula antillarum) Order: CHARADRIIFORMES: Family (Latin) Laridae: Family (English) Gulls, Terns, Skimmers: Other name(s) Regions: NA, MA: Breeding Range Subregions: widespread: Nonbreeding Range … The smallest of American terns, the Least Tern is found nesting on sandy beaches along the southern coasts of the United States and up the major river systems far into the interior of the continent. The wings are mostly pale gray, but with conspicuous black markings on their outermost primaries. Late-season nesting may be renests or the result of late arrivals. The Least Tern is a priority species for ABC. A least tern attacking a much larger black skimmer near Drum Inlet in North Carolina, United States. Cornell Lab of Ornithology, Ithaca, NY, USA. Age at first flight about 19-20 days; young may remain with parents another 2-3 months. Populations of this species are listed as threatened under the State of Connecticut Endangered Species Act. Young: Leave nest a few days after hatching, find places to hide nearby. It has short legs; long, pointed wings and a forked tail. Legal Notices Privacy Policy Contact Us.

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