Saint Helena plover | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Class: | Aves |
Order: | Charadriiformes |
Family: | Charadriidae |
Genus: | Charadrius |
Species: | C. sanctaehelenae |
Binomial name | |
Charadrius sanctaehelenae (Harting, 1873) | |
Location of Saint Helena |
The Saint Helena plover (Charadrius sanctaehelenae), locally known as the wirebird due to its thin legs, is a small wader endemic to the island of Saint Helena in the mid-Atlantic. The bird is similar in appearance to Kittlitz's plover and the Madagascar plover, but a little larger and an absence of chamois coloring. It is the national bird of St Helena and has been depicted on the country's coins. Populations in general have been declining. Threats include predation by cats, the introduction of the common myna, deforestation, off-road vehicle use, the Saint Helena Airport and a projected windfarm. In 2016, the population had recovered to about 560 mature individuals, from a previous minimum of less than 200 in 2006; consequently, the species was downlisted to Vulnerable from its previous assessment of Critically Endangered.
Kittlitz's plover is the Saint Helena bird's closest relative. [2] The Saint Helena plover is generally larger (around 15 cm (6 in) in size [3] ) with spindlier legs.
The bird was first mentioned in 1638, and is the national bird of Saint Helena, featured on the island's coat of arms and flag. Some older local 5 pence coins (those issued prior to 1998) have the wirebird on the reverse.
This plover is resident all year on the open areas of Saint Helena, and it is thought that the widespread deforestation on the island, while generally harmful for the island's ecosystem, has in fact benefitted this particular species, since it lives in open clearings in the forest.
Saint Helena plover numbers have been fluctuating, but in general the trend has been downward since at least the 1970s. Feral cats and accidentally introduced rats are believed to have played a significant role in the decline, as, to a lesser extent has the introduced common myna. [4]
A census in 1988–89 recorded roughly 450 birds, although that number declined sharply over the following decade, due to causes not fully understood. By the late 1990s and early 2000s, censuses suggested that the bird's numbers had stabilised at about 350 adults. However, surveys done in 2005–6 recorded another sharp decline, with only some 200–220 adult birds remaining. Due to its dropping numbers and uncertain prospects, the Saint Helena plover was uplisted to Critically Endangered in the 2007 version of the IUCN Red List. A reassessment in 2016 suggested that the population had recovered somewhat from this minimum and may be slowly increasing; as a consequence, the species was downlisted to Vulnerable.
The reasons for the previous decline and ongoing inhibition of population growth decline remain elusive. Habitat loss—due to changes in agricultural practices, increases in invasive plant populations, and development—has almost certainly had an impact. The increasing use of off-road vehicles threatens nests and eggs. Feral cat populations are increasing, as trapping levels have declined and fewer people neuter their pet cats. Construction activity has apparently dispersed some of the smaller subpopulations. The newly built Saint Helena Airport at Prosperous Bay Plain has altered one of the major patches of remaining habitat, especially as other grassland is now slated for reforestation to aid recovery of the island's ecosystem, and a major wind turbine project has been proposed for the species' most important breeding area. There are currently projects underway led by the RSPB to monitor the birds and try to stop their decline. [3]
The piping plover is a small sand-colored, sparrow-sized shorebird that nests and feeds along coastal sand and gravel beaches in North America. The adult has yellow-orange-red legs, a black band across the forehead from eye to eye, and a black stripe running along the breast line. This chest band is usually thicker in males during the breeding season, and it is the only reliable way to tell the sexes apart. The bird is difficult to see when it is standing still, as it blends well with open, sandy beach habitats. It typically runs in short, quick spurts and then stops.
The snowy plover is a small wader in the plover bird family, typically about 5-7" in length. It breeds in the southern and western United States, the Caribbean, Ecuador, Peru, and Chile. Long considered to be a subspecies of the Kentish plover, it is now known to be a distinct species.
Charadrius is a genus of plovers, a group of wading birds. The genus name Charadrius is a Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate. They are found throughout the world.
Kittlitz's plover is a small shorebird in the family Charadriidae that breeds near coastal and inland saltmarshes, sandy or muddy riverbanks or alkaline grasslands with short vegetation. It is native to much of Sub-Saharan Africa, the Nile Delta and Madagascar. It is thought to be mainly polygamous and has monomorphic plumage.
The mountain plover is a medium-sized ground bird in the plover family (Charadriidae). It is misnamed, as it lives on level land. Unlike most plovers, it is usually not found near bodies of water or even on wet soil; it prefers dry habitat with short grass and bare ground. it's height is in the range of 5-9 inches, and it's length is in the range of 8-10 inches, and it wrights around 102 grams.
Kittlitz's murrelet is a small alcid found in the waters off Alaska and Eastern Siberia. This near threatened species is, like the closely related marbled murrelet, unusual for seabirds in not being colonial, nesting instead in isolated locations on mountain tops, where the nests were known to Native Americans for many years before skeptical ornithologists described and photographed them. It is a poorly known and little studied species, although concern over its status and that of the closely related marbled murrelet has led to a recent increase in research.
The double-banded plover, known as the banded dotterel or pohowera in New Zealand, is a species of bird in the plover family. Two subspecies are recognised: the nominate Charadrius bicinctus bicinctus, which breeds throughout New Zealand, including the Chatham Islands, and Charadrius bicinctus exilis, which breeds in New Zealand's subantarctic Auckland Islands.
The New Zealand dotterel is a species of shorebird found only in certain areas of New Zealand. It is also called the New Zealand plover or red-breasted dotterel, and its Māori names include tūturiwhatu, pukunui, and kūkuruatu.
The coat of arms of Saint Helena, part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, was authorised on 30 January 1984.
The Bonin thrush, also known as Kittlitz's thrush or the Bonin Islands thrush, is an extinct species of Asian thrush. It is sometimes separated as the only species of the genus Cichlopasser. The only place where this bird was found was Chichi-jima in the Ogasawara Islands; it might conceivably have inhabited Anijima and Otōtojima, but this has not been borne out by observations or specimens. The species was only once observed by a naturalist, its discoverer Heinrich von Kittlitz. He encountered the thrush in the coastal woods where it usually kept to the ground; it may have been ground-nesting. The only specimens ever taken are in the Naturalis in Leiden (1), the Naturhistorisches Museum in Vienna (1), the Senckenbergmuseum in Frankfurt (1) and in the Zoological Museum, St. Petersburg (2).
Saint Helena, Ascension Island and Tristan da Cunha, as well the other uninhabited islands nearby, are a haven for wildlife in the middle of the Atlantic Ocean. The islands are or were home to much endemic flora and fauna, especially invertebrates, and many endemic fish species are found in the reef ecosystems off the islands. The islands have been identified by BirdLife International as Important Bird Areas for both their endemic landbirds and breeding seabirds.
The white-fronted plover or white-fronted sandplover is a small shorebird of the family Charadriidae that inhabits sandy beaches, dunes, mudflats and the shores of rivers and lakes in sub-saharan Africa and Madagascar. It nests in small shallow scrapes in the ground and lays clutches of one to three eggs. The species is monogamous and long-lived, with a life expectancy of approximately 12 years. The vast majority of pairs that mate together stay together during the following years of breeding and retain the same territory. The white-fronted plover has a similar appearance to the Kentish plover, with a white fore crown and dark bands connecting the eyes to the bill.
The Kentish plover is a small wader of the family Charadriidae that breeds on the shores of saline lakes, lagoons, and coasts, populating sand dunes, marshes, semi-arid desert, and tundra. Both male and female birds have pale plumages with a white underside, grey/brown back, dark legs and a dark bill; however, additionally the male birds also exhibit very dark incomplete breast bands, and dark markings either side of their head, therefore the Kentish plover is regarded as sexually dimorphic.
The shore plover, also known as the shore dotterel, is a small plover endemic to New Zealand. Once found all around the New Zealand coast, it is now restricted to a few offshore islands. It is one of the world's rarest shorebirds: the population is roughly 200.
The long-billed plover is a species of wading bird in the family Charadriidae. It can be found in Bangladesh, Bhutan, Brunei, Cambodia, China, Hong Kong, India, Indonesia, Japan, Laos, Malaysia, Mongolia, Myanmar, Nepal, North Korea, Russia, South Korea, Sri Lanka, Taiwan, Thailand, and Vietnam. The long-billed plover is a migratory bird, so it breeds and spends the winter in different parts of its range. This bird can often be spotted along the shores of rivers, streams, in wetlands, and rice fields. It forages on the shoreline primarily for aquatic insects, insect larvae, and other invertebrates. It is difficult to distinguish between male and female individuals because of their similar plumage. The breeding season starts at the end of February or early March and ends in July. A male and a female forms a monogamous pair and maintains their territory throughout the breeding season. A global population survey in 2016 assessed the long-billed plover as a species of least concern on the International Union for Conservation of Nature (IUCN) Red List.
The Rapa fruit dove is a species of bird in the family Columbidae, which includes pigeons and doves. It is endemic to the island of Rapa Iti in French Polynesia. The species was classified as Critically Endangered by the IUCN Red List in 2018 because of its small population and predicted continued decline. The Rapa fruit dove primarily feeds on fleshy fruit. Its natural habitat is subtropical or tropical moist lowland forests and it has an extent of 30 km2. It is threatened by habitat loss due to deforestation and invasive species. Effective land protection and management could increase the quality of habitat for the species. Additional research into population dynamics and the impact of threats to the species can give a better understanding of the conservation practices needed.
The Ascension scrub and grasslands ecoregion covers the dormant volcano, Ascension Island in the Atlantic Ocean. As well as shrubs and grasses wildlife on the island includes a range of unique flora and fauna. In particular the surrounding islets are important havens for many seabirds. However the seabird populations on Ascension Island itself have been severely affected by introduced species, especially cats, which were the subject of an eradication campaign between 2002 and 2006.
The northern New Zealand dotterel or northern red-breasted plover is a shorebird which breeds exclusively on beaches in New Zealand's North Island.
The southern New Zealand dotterel or southern red-breasted plover is a critically endangered subspecies of the New Zealand dotterel, a shorebird endemic to New Zealand. The subspecies was once widespread across the South Island, but now breeds almost exclusively on Stewart Island.