Saturday, April 2, 2011

Northern Lapwing.

The Northern Lapwing (Vanellus vanellus), also known as the Peewit, Green Plover or (in the British Isles) just Lapwing, is a bird in the plover family. It is common through temperate Eurasia. It is highly migratory over most of its extensive range, wintering further south as far as north Africa, northern India,Pakistan, and parts of China. It migrates mainly by day, often in large flocks. Lowland breeders in westernmost areas of Europe are resident. It occasionally is a vagrant to North America, especially after storms, as in the Canadian sightings after storms in December 1927 and in January 1966.

It is a wader which breeds on cultivated land and other short vegetation habitats. 3–4 eggs are laid in a ground scrape. The nest and young are defended noisily and aggressively against all intruders, up to and including horses and cattle.

In winter it forms huge flocks on open land, particularly arable land and mud-flats.

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Description

This lapwing is a 28–31 cm long bird with a 67–72 cm wingspan, It has rounded wings and a crest. It is the shortest-legged of the lapwings. It is mainly black and white, but the back is tinted green. Females and young birds have narrower wings, and have less strongly marked heads, but plumages are otherwise quite similar.

The name lapwing has been variously attributed to the "lapping" sound its wings make in flight, from the irregular progress in flight due to its large wings (OED derives this from an Old English word meaning "to totter"), or from its habit of drawing potential predators away from its nest by trailing a wing as if broken.Peewit describes the bird's shrill call. This is a vocal bird in the breeding season, with constant calling as the crazed tumbling display flight is performed by the male.

It feeds primarily on mainly insects and other small invertebrates. This species often feeds in mixed flocks with Golden Plovers and Black-headed Gulls, the latter often robbing the two plovers, but providing a degree of protection against predators.

Like the Golden Plovers, this species prefers to feed at night when there are moonlit nights.

The Northern Lapwing is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

Population decline

National surveys of England and Wales have shown a population decline between 1987 and 1998. The numbers of this species have been adversely affected by intensive agricultural techniques. In the lowlands this includes the loss of rough grassland, conversion to arable or improved grassland, loss of mixed farms, and switch from spring to autumn sown crops. In the uplands the losses may have been due to increases in grazing density.

Natural England gives grant aid to help restore lapwing habitat within its Environmental Stew

ardship Scheme. The organisation suggests an option within this scheme called 'Fallow plots for ground-nesting birds'. Uncropped plots at least 2 ha in size provide nesting habitat, and are located in suitable arable fields, which provide additional foraging habitat. Locating the plots within 2 km of extensively grazed grassland will provide additional foraging habitat. The plots is cultivated in the spring to produce a rough fallow, which is retained without the input of fertiliser or pesticides.

Cultural significance

Harvesting eggs

In the Netherlands there is a cultural-historical competition to finds the first peewit egg of the year (het eerste kievitsei). It is especially popular in Friesland province, but there are also regional competitions. The gathering of peewit eggs is prohibited by the European Union, but Friesland was granted an exception for cultural-historical reasons. The Frisian exception was removed in 2005 by a court, which determined that the Frisian executive councillors had not properly followed procedure. As of 2006 it is again allowed to look for peewit eggs between 1 March and 9 April, though the actual harvest of those eggs is now forbidden. The first egg of 2008 was found on 3 March, in Eemnes, Utrecht, as was the first egg of 2009 found on 8 March. Over the last century, the first peewit egg is found earlier and earlier. This is caused both by increase use of fertiliser and climate change.

Mythology
The bird referred to in English translations of Ovid's Metamorphoses, book 6 (the story of King Tereus of Thrace, who rapes his wife's sister, Philomela, and cuts out her tongue), as lapwing is probably the Northern lapwing. Tereus is turned into an epops (6.674); Ovid presumably had the hoopoe in mind, whose crest indicates his royal status and whose long, sharp beak is a symbol of his violent nature.

References

Lapwing (Birds).

Vanellinae are any of various crested plovers, family Charadriidae, noted for its slow, irregular wingbeat in flight and a shrill, wailing cry. Its length is 10-16 inches. They are a subfamily of medium-sized wading birds which also includes the plovers and dotterels. The Vanellinae are collectively calledlapwings but also contain the ancient Red-kneed Dotterel. A lapwing can be thought of as a larger plover.

The traditional terms "plover", "lapwing" and "dotterel" were coined long before modern understandings of the relationships between different groups of birds emerged: in consequence, several of the Vanellinae are still often called "plovers", and the reverse also applies, albeit more rarely, to some Charadriinae(the "true" plovers and dotterels).

In Europe, "lapwing" often refers specifically to the Northern Lapwing, the only member of this group to occur in most of the continent.

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Systematics

While authorities generally agree that there about 25 species of Vanellinae, classifications within the subfamily remain confused. At one extreme, Peters recognised no less than 20 different genera for the birds listed in 2 genera here; other workers have gone so far as to group all the "true" lapwings (except the Red-kneed Dotterel) into the single genus Vanellus. Current consensus favors a more moderate position, but it is unclear which genera to split. The Handbook of Birds of the World provisionally lumps all Vanellinae into Vanellus except the Red-kneed Dotterel, which is in themonotypic Erythrogonys. Its plesiomorphic habitus resembles that of plovers, but details like the missing hallux (hind toe) are like those of lapwings: it is still not entirely clear whether it is better considered the basalmost plover or lapwing.

Many coloration details of the Red-kneed Dotterel also occur here and there among the living members of the main lapwing clade. Its position as the mostbasal of the living Vanellinae or just immediately outside it thus means that their last common ancestor - or even the last common ancestor of plovers and lapwings - almost certainly was a plover-sized bird with a black crown and breast-band, a white feather patch at the wrist, no hallux, and a lipochromic(probably red) bill with a black tip. Its legs were most likely black or the color of the bill's base.


1.1 Evolution

The fossil record of the Vanellinae is scant and mostly recent in origin; no Neogene lapwings seem to be known. On the other hand, it appears as if early in their evolutionary history the plovers, lapwings and dotterels must have been almost one and the same, and they are hard to distinguishosteologically even today. Thus, since the Red-kneed Dotterel is so distinct that it might arguably be considered a monotypic subfamily, reliably dating its divergence from a selection of true lapwings and plovers would also give a good idea of charadriid wader evolution altogether.

A mid-Oligocene - c.28 mya (million years ago) - fossil from Rupelmonde in Belgium has been assigned to Vanellus, but even if the genus were broadly defined, it is entirely unclear if the placement is correct. Its age ties in with the appearance of the first seemingly distinct Charadriinae at about the same time, and with the presence of more basal Charadriidae a few million years earlier. However, the assignment of fragmentary fossils to Charadriinae or Vanellinae is not easy. Thus, it is very likely that the charadriid waders originate around the Eocene-Oligocene boundary - roughly 40-30 mya - but nothing more can be said at present. If the Belgian fossil is not a true lapwing, there are actually no Vanellinae fossils known before the Quaternary.

The Early Oligocene fossil Dolicopterus from Ronzon (France) may be such an ancestral member of the Charadriidae or even the Vanellinae, but it has not been studied in recent decades and is in dire need of review.

Apart from the prehistoric Vanellus, the extinct lapwing genus Viator has been described from fossils. Its remains were found in the tar pits of Talara in Peru and it lived in the Late Pleistocene. Little is known of this rather large lapwing; it may actually belong in Vanellus.

Interestingly, the remaining Charadrii are highset and/or chunky birds, even decidedly larger than a lot of the scolopacid waders. The evolutionary trend regarding the Charadriidae - which make up most of the diversity of the Charadrii - thus runs contrary to Cope's Rule.


1.2 List of species in taxonomic order

Genus Vanellus

Genus Erythrogonys

References

External links

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As spring approaches, millions of birds will wing their way back to North America. Red Knots near Tierra del Fuego will make a remarkable journey to the arctic tundra. Swainson’s Hawks leave their winter homes in Argentina, flying north for up to 22,500 kilometres. Ruby-throated Hummingbirds have already begun to make landfall after crossing the Gulf of Mexico.

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