Dalmatian Pelicans, Eurasian Spoonbills & a Grey Heron
The Dalmatian pelican (Pelecanus crispus) is a massive member of the pelican family, and the world’s largest freshwater bird. They are elegant soaring birds, with wingspans that rival that of the great albatrosses, and their flocks fly in graceful synchrony. It is a short to medium distance migrant between breeding and overwintering areas. No subspecies are known to exist over its wide range, but based on size differences, a Pleistocene paleosubspecies, P. c. palaeocrispus, has been described from fossils recovered at Binagady, Azerbaijan.
As with other pelicans, the males are larger than the females, and likewise their diet is mainly fish. Their curly nape feathers, grey legs and silvery-white plumage are distinguishing features, and the wings appear solid grey in flight. The adults acquire a drabber plumage in winter, however, when they may be mistaken for great white pelicans. Their harsh vocalizations become more pronounced during the mating season. They breed from southeastern Europe to Russia, India and China in swamps and shallow lakes. They usually return to traditional breeding sites, where they are less social than other pelican species. Their nests are crude heaps of vegetation, which are placed on islands or on dense mats of vegetation.
The species’ numbers underwent a dramatic decline during the 20th century, partly due to land use, disturbance and poaching activities. The core population survives in Russia, but in its Mongolian range it is critically endangered. Removal of power lines to prevent collisions or electrocution, and the construction of nesting platforms or rafts have reversed declines locally.
This huge bird is by a slight margin the largest of the pelican species and one of the largest living bird species. It measures 160 to 183 cm (5 ft 3 in to 6 ft 0 in) in length, 7.25–15 kg (16.0–33.1 lb) in weight and 245 to 351 cm (8 ft 0 in to 11 ft 6 in) in wingspan. Its median weight is around 11.5 kg (25 lb), which makes it perhaps the world’s heaviest flying bird species, although the largest individuals among male bustards and swans may be heavier than the largest individual Dalmatian pelican. More recently, six male Dalmatians were found to average 10.4 kg (23 lb) and four females 8.7 kg (19 lb), around the same average weight as the great white pelican (Pelecanus onocrotalus) and slightly lighter than mean body masses from other huge birds such as the trumpeter swan (Cygnus buccinator) or Andean condor (Vultur gryphus). A mean estimated body mass for the Dalmatian pelican of 10.9 kg (24 lb) was also published, around the same mass as the aforementioned largest swan and condor. It is either the heaviest or one of the heaviest birds native to Europe, its closest rivals in mass being mute swans (Cygnus olor) and cinereous vultures (Aegypius monachus), which both weigh on average around 10 kg (22 lb), followed closely by great white pelicans and the whooper swans (Cygnus cygnus). It also appears to have one of the largest wingspans of any living bird, rivaling those of the great albatrosses (Diomedea ssp., in particular the two largest species, the wandering albatross and southern royal albatross) and the great white pelican. These four species are the only modern birds with verified wingspans that range over 350 cm (11 ft 6 in).
The somewhat similar-looking great white pelican broadly overlaps in size but has greater size sexual dimorphism: female great whites can be noticeably smaller than female Dalmatians but male individuals of the two species are essentially the same size and weight. However, the Dalmatian differs from this other very large species in that it has curly nape feathers, grey legs and silvery-white (rather than pure white) plumage. In winter, adult Dalmatian pelicans go from silvery-grey to a dingier brownish-grey cream colour. Immature birds are grey and lack the pink facial patch of immature white pelicans. The loose feathers around the forehead of the Dalmatian pelican can form a W-like-shape on the face right above the bill. In the breeding season it has an orange-red lower mandible and pouch against a yellow upper mandible. In winter, the whole bill is a somewhat dull yellow. The bill, at 36 to 45 cm (14 to 18 in) long, is the second largest of any bird, after the Australian pelican (Pelecanus conspicillatus). The bare skin around the eye can vary from yellow to purplish in colour. Among standard measurements, compared to the great white pelican, the Dalmatian’s tarsus is slightly shorter, at 11.6 to 12.2 cm (4.6 to 4.8 in), but its tail and wing chord length are notably larger, at 22 to 24 cm (8.7 to 9.4 in) long and 68 to 80 cm (27 to 31 in), respectively. When the Dalmatian pelican is in flight, unlike other pelicans, its wings are solid grayish-white with black tips. It is an elegant soaring bird. When a whole flock of Dalmatian pelicans is in flight, all its members move in graceful synchrony, their necks held back like a heron’s.
The Dalmatian pelican is often silent, as most pelicans tend to be, although it can be fairly vocal during the mating season, when it may engage in a wide range of guttural, deep vocalisations, including barks, hisses and grunts.
The Dalmatian pelican is found in lakes, rivers, deltas and estuaries. Compared to the great white pelican, the Dalmatian is not as tied to lowland areas and will nest in suitable wetlands with many elevations. It is less opportunistic in breeding habitat selection than the great white, usually returning to a traditional breeding site year after year unless it becomes completely unsuitable. During the winter, Dalmatian pelicans usually stay on ice-free lakes in Europe or jheels (seasonal lakes) in India. They also visit, typically during winter, inshore areas along sheltered coasts for feeding.
This pelican usually migrates short distances. It is dispersive in Europe, based on feeding opportunities, with most western birds staying through the winter in the Mediterranean region. In the Danube Delta, Dalmatian pelicans arrive in March and leave by the end of August. It is more actively migratory in Asia, where most of the birds that breed in Russia fly down for the winter to the central Middle East, largely around Iran through to the Indian Subcontinent, from Sri Lanka, Nepal to central India. The pelicans that breed in Mongolia winter along the east coast of China, including the Hong Kong area.
In general, the species prefers relatively warm temperatures. During periods where the climate was warmer, the Dalmatian pelican was far more widespread in Europe (today its European range is restricted to the southeastern part of the continent). Notably, a large number of subfossil bones dating from 7400–5000 Before Present (BP), coinciding with the Holocene climatic optimum, have been found in Denmark, and bones dating from 1900–800 BP have been found in central Europe and Britain.[18] This preference for warmer temperatures is also supported by movements recorded in recent history, as there are indications of a slow range expansion in response to modern climate changes.
The Dalmatian pelican is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies. Conservation efforts have been undertaken on behalf of the species, especially in Europe. Although they normally nest on the ground, Dalmatian pelicans have nested on platforms put out in Turkey, Greece, Bulgaria and Romania in order to encourage them to breed. Rafts over water have also been set up for the species to use in Greece and Bulgaria. Power-lines have also been marked or dismantled in areas adjacent to colonies in these countries. Additionally, water-level management and educational programs may be aiding them at a local level. Although efforts have been undertaken in Asia, there is a much higher rate of poaching, shooting and habitat destruction there, which may make conservation efforts more difficult. In 2012, when unusually frigid winter conditions caused the Caspian Sea to freeze over, it resulted in the death from starvation of at least twenty of the Dalmatian pelicans that overwinter there. Despite local authorities’ initial attempts to discourage it, many people there turned out with fish and hand-fed the birds, apparently enabling the huge pelicans to survive the winter.
The grey heron (Ardea cinerea) is a long-legged predatory wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in much of its range, but some populations from the more northern parts migrate southwards in autumn. A bird of wetland areas, it can be seen around lakes, rivers, ponds, marshes and on the sea coast. It feeds mostly on aquatic creatures which it catches after standing stationary beside or in the water or stalking its prey through the shallows.
Standing up to a metre tall, adults weigh from 1 to 2 kg (2.2 to 4.4 lb). They have a white head and neck with a broad black stripe that extends from the eye to the black crest. The body and wings are grey above and the underparts are greyish-white, with some black on the flanks. The long, sharply pointed beak is pinkish-yellow and the legs are brown.
The birds breed colonially in spring in "heronries", usually building their nests high in trees. A clutch of usually three to five bluish-green eggs is laid. Both birds incubate the eggs for a period of about 25 days, and then both feed the chicks, which fledge when seven or eight weeks old. Many juveniles do not survive their first winter, but if they do, they can expect to live for about five years.
In Ancient Egypt, the deity Bennu was depicted as a heron in New Kingdom artwork. In Ancient Rome, the heron was a bird of divination. Roast heron was once a specially-prized dish; when George Neville became Archbishop of York in 1465, four hundred herons were served to the guests.
The grey heron is a large bird, standing up to 100 cm (39 in) tall and measuring 84–102 cm (33–40 in) long with a 155–195 cm (61–77 in) wingspan.[2] The body weight can range from 1.02–2.08 kg (2.2–4.6 lb). The plumage is largely ashy-grey above, and greyish-white below with some black on the flanks. Adults have the head and neck white with a broad black supercilium that terminates in the slender, dangling crest, and bluish-black streaks on the front of the neck. The scapular feathers are elongated and the feathers at the base of the neck are also somewhat elongated. Immature birds lack the dark stripe on the head and are generally duller in appearance than adults, with a grey head and neck, and a small, dark grey crest. The pinkish-yellow beak is long, straight and powerful, and is brighter in colour in breeding adults. The iris is yellow and the legs are brown and very long.
The main call is a loud croaking "fraaank", but a variety of guttural and raucous noises are heard at the breeding colony. The male uses an advertisement call to encourage a female to join him at the nest, and both sexes use various greeting calls after a pair bond has been established. A loud, harsh "schaah" is used by the male in driving other birds from the vicinity of the nest and a soft "gogogo" expresses anxiety, as when a predator is nearby or a human walks past the colony. The chicks utter loud chattering or ticking noises.
The Eurasian spoonbill or common spoonbill (Platalea leucorodia) is a wading bird of the ibis and spoonbill family Threskiornithidae. The genus name Platalea is from Latin and means "broad", referring to the distinctive shape of the bill, and leucorodia is from Ancient Greek leukerodios "spoonbill", itself derived from leukos, "white" and erodios "heron".
This is a Palearctic species, breeding from the United Kingdom and Spain in the west through to Japan, and also in North Africa. In Europe, only the Netherlands, Spain, Austria, Hungary and Greece have sizeable populations. Most birds migrate to the tropics in winter, with European breeders mainly going to Africa, but a few remaining in mild winter areas of western Europe south to the United Kingdom. It was extirpated from the United Kingdom but sporadic breeding attempts in the early 21st century culminated with the formation of a colony at Holkham in Norfolk in 2010. In 2011, 8 breeding pairs nested, successfully fledging 14 young.
This species is almost unmistakable in most of its range. The breeding bird is all white except for its dark legs, black bill with a yellow tip, and a yellow breast patch like a pelican. It has a crest in the breeding season. Non-breeders lack the crest and breast patch, and immature birds have a pale bill and black tips to the primary flight feathers. Unlike herons, spoonbills fly with their necks outstretched. The Eurasian spoonbill differs from the African spoonbill with which in overlaps in winter, in that the latter species has a red face and legs, and no crest.
They are mostly silent. Even at their breeding colonies the main sounds are bill snapping, occasional deep grunting and occasional trumpeting noises.
Eurasian spoonbills show a preference for extensive shallow, wetlands with muddy, clay or fine sandy beds. They may inhabit any type of marsh, river, lake, flooded area and mangrove swamp, whether fresh, brackish or saline, but especially those with islands for nesting or dense emergent vegetation (e.g. reedbeds) and scattered trees or scrubs (especially willow Salix spp., oak Quercus spp. or poplar Populus spp.). Eurasian spoonbills may also frequent sheltered marine habitats during the winter such as deltas, estuaries, tidal creeks and coastal lagoons.
Posted by siddharthx on 2018-02-04 14:15:01
Tagged: , Architecture , Artisans , Astrophotography , Bee Eaters , Bhuj , Birding , Birds , Birds of Prey , Canon , Canon7DMkII , Common Cranes , Copper Bell Art , Cottage , Dasada , Deomiselle Crane , Dholavira , Ducks , EF100-400mmf4.5-5.6 , EF24-70mmf4 , Flamingos , Flatland , Great Rann of Kutch , Gujarat , Harappan Civilization , Harappan Metropolis , Herons , Horizon , India , Kingfishers , Kutch Wilderness Kamp , Little Rann of Kutch , Long Exposures , Madapol Fort Gate , Marsh , Modhera , Modhera Sun Temple , Patan , Pelicans , Rani ki Vav , Rann Riders , Rann of Kutch , Raptors , Resorts , Robins , Rogan Art , Rudramata Dam , Rudramata Reservoir , Salt Flat , Salt Marsh , Samyang14mmf2.8 , Sigma50mmf1.4 , Star Photography , Star Trails , Stilts , Temple , Terns , Travel , WIldlife , White Desert , Wild Ass , Wild Ass Sanctuary , Wildlife Photography , Wildlife Resort , Woodwork , Yondering , Savda , IN
#furniture #DIY #woodwork #woodworking #freedownload#woodworkingprojects #woodsmith ,wood craft, wood planer, fine woodworking, wooden chairs, wood working tools, popular woodworking, woodworking books, woodworking workbench plans