The locations sampled during the annual Seabird Monitoring Programme provide some information on distribution and are accessible via the Seabird Monitoring Programme online database. The common tern is the most widespread and abundant tern in New York. Some species are common and have booming populations, while others are rare and declining. Migrating birds can be seen offshore in autumn. One of four very similar terns on this continent. Common Terns nest on rocky islands, barrier beaches, and saltmarshes and forage over open waters. The consequences of these human interactions vary from species to species. Regardless of worldwide laws defending the common tern, in some areas populations are threatened by habitat loss, air pollution or the disturbance of breeding colonies. Unlike many larger terns, the Common Tern … The species lives up to its name as a "common" tern mainly in the northeast; over much of the continent, it is outnumbered by the similar Forster's Tern. In breeding plumage, the Common Tern has a light gray mantle and belly, a white tail, a white face, and a black cap. In addition to descriptive studies of behavior, foraging, diet, breeding biology, and molt, it has been used for many detailed studies of behavior, ecology, physiology, growth, energetics, contaminants, and toxicology. The Common Tern’s future on Lake of the Woods may reside entirely on the ability of the remote islets near the Northwest Angle to provide suitable breeding habitat. Terns often gather over warmer waters with high densities of American sand lance (a small fish) in the spring, and tuna that help scare up smaller fish in the fall. 2003). The Common Tern is also known as the Asiatic Common Tern, Black-billed Tern or Long-winged Tern.

Description The nominate subspecies of the common tern is 31–35 cm (12–14 in) lengthy, together with a 6–9 cm (2.4–3.5 in) fork within the tail, with a 77–98 cm (30–39 in) wingspan. The common tern breeds along coasts with shingle beaches and rocky islands, on rivers with shingle bars, and at inland gravel pits and reservoirs, feeding along rivers and over freshwater. Common terns select isolated, sparsely vegetated islands in large lakes for nesting. Habitat destruction and pollution is a problem for many different species of Terns. Regardless of worldwide laws defending the common tern, in some areas populations are threatened by habitat loss, air pollution or the disturbance of breeding colonies. The Common Tern is mainly coastal when not breeding and found in offshore waters, ocean beaches, estuaries and large lakes. Particular attention should be paid to adults observed carrying food in their bill during the nesting period because they may be returning to the nesting area to feed young. Its pointed wingtips are noticeably darker than those of the roseate tern with which it associates. Numbers of common tern found in different regions, and a map showing the location and size of colonies, is provided in the Seabird 2000 common tern results page. The Common Tern is a streamlined bird with narrow, pointed wings. It is strongly migratory, wintering in coastal tropical and subtropical regions. Common terns can also be distinguished by their calls, which are somewhat higher and longer in duration than those of the Forster's tern. The Common Tern readily habituates to the presence and activity of biologists and has been the subject of many intensive studies. Habitat. The common tern (Sterna hirundo) is a seabird in the family Laridae.This bird has a circumpolar distribution, its four subspecies breeding in temperate and subarctic regions of Europe, Asia and North America. Habitat. The major factors impacting Common Tern populations are universal and include pesticide contaminants, human disturbance, predation, and habitat loss and degradation (Cuthbert et al. Also widespread in the Old World. Open edges of sandy or … This species has a light grey back, white underparts, a white, deeply forked tail, and a glossy black cap and nape. Common Tern Across its European range, Common Terns are associated with both fresh-water and marine environments, nesting in inland countries such as Switzerland and up to altitudes of 2000 metres.

Common Terns are occasionally seen in freshwater swamps, floodwaters, sewage farms and brackish and saline lakes.

Similar Species The Common Tern has a deeply forked tail and is a medium-sized tern, bigger and bulkier than the Arctic Tern, S.paradisaea, and the Roseate Tern, S. dougallii , but smaller than the White-fronted Tern, S. striata . The tail extends beyond the wingtips when the bird is perched.

The fact that the species has taken advantage of opportunities created in newly flooded gravel pits and on nesting-rafts, anchored in reservoirs, should therefore come as no surprise. These sites are not surveyed every year, and even when surveys are conducted it can be difficult to reach all sites with potential habitat.

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