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Pigeon Skeleton

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The skeleton of a pigeon weighs just one twentieth of the weight of its whole body. This is to help it fly.

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• Bird - Bird - Skeleton: The avian skeleton is notable for its strength and lightness, achieved by fusion of elements and by pneumatization (i.e., presence of air cavities). The skull represents an advance over that of reptiles in the relatively larger cranium with fusion of elements, made possible by the fact that birds have a fixed adult size.
• The primary function of the game is for the user to control a Pigeon and prevent it from colliding with enemy objects (named “Dodgeables” within the code). The Pigeon flies with a positive velocity.

For the same reason as airlines fuss about luggage allowances, birds have evolved to ensure that as many savings as possible are made on weight. To be able to fly they have to work within weight limits so they have a very lightweight skeleton. Their bones are not as solid as ours; they are hollow with a network of struts to reinforce them. The skull is light so that it does not weigh the bird down in the air. Birds do not have any unnecessary bones or teeth.

But birds have to be strong too so that they can fly for long distances. They have small compact bodies and most of the weight is in the centre. The strong breastbone balances the pull of the flapping wings. The long neck is flexible helping the bird to reach food and preen its feathers.

Pigeons eat both wild and cultivated plants. They have one unique feature, which is a pointed beak which they can use like a straw when drinking.

Play Skeleton Games @ FreeGames.com. We have over 100,000 games. Enter & play now! Pigeon Skeleton, Articulated 5.0 out of 5 stars 2 ratings. Currently unavailable. We don't know when or if this item will be back in stock. Specifications for this item. Brand Name: Mongoo Item Weight: 1.30 pounds Part Number: 245130 UNSPSC Code: 41000000 See more. Customers also shopped for.

The skeleton of a pigeon weighs just one twentieth of the weight of its whole body. This is to help it fly.

For the same reason as airlines fuss about luggage allowances, birds have evolved to ensure that as many savings as possible are made on weight. To be able to fly they have to work within weight limits so they have a very lightweight skeleton. Their bones are not as solid as ours; they are hollow with a network of struts to reinforce them. The skull is light so that it does not weigh the bird down in the air. Birds do not have any unnecessary bones or teeth.

But birds have to be strong too so that they can fly for long distances. They have small compact bodies and most of the weight is in the centre. The strong breastbone balances the pull of the flapping wings. The long neck is flexible helping the bird to reach food and preen its feathers.

Pigeons eat both wild and cultivated plants. They have one unique feature, which is a pointed beak which they can use like a straw when drinking.

• Natural history
  • Locomotion
  • Behaviour
• Form and function
  • Feathers
• Evolution and paleontology
• Classification

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Pigeon Skeleton Games

Bird, (class Aves), any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from all other animals. A more-elaborate definition would note that they are warm-blooded vertebrates more related to reptiles than to mammals and that they have a four-chambered heart (as do mammals), forelimbs modified into wings (a trait shared with bats), a hard-shelled egg, and keen vision, the major sense they rely on for information about the environment. Their sense of smell is not highly developed, and auditory range is limited. Most birds are diurnal in habit. More than 1,000 extinct species have been identified from fossil remains.

Since earliest times birds have been not only a material but also a cultural resource. Bird figures were created by prehistoric humans in the Lascaux Grotto of France and have featured prominently in the mythology and literature of societies throughout the world. Long before ornithology was practiced as a science, interest in birds and the knowledge of them found expression in conversation and stories, which then crystallized into the records of general culture. Ancient Egyptian hieroglyphs and paintings, for example, include bird figures. The Bible refers to Noah’s use of the raven and dove to bring him information about the proverbial Flood.

Various bird attributes, real or imagined, have led to their symbolic use in language as in art. Aesop’s fables abound in bird characters. The Physiologus and its descendants, the bestiaries of the Middle Ages, contain moralistic writings that use birds as symbols for conveying ideas but indicate little knowledge of the birds themselves. Supernatural beliefs about birds probably took hold as early as recognition of the fact that some birds were good to eat. Australian Aborigines, for example, drove the black-and-white flycatcher from camp, lest it overhear conversation and carry the tales to enemies. Peoples of the Pacific Islands saw frigate birds as symbols of the Sun and as carriers of omens and frequently portrayed them in their art. The raven—a common symbol of dark prophecy—was the most important creature to the Indians of the Pacific Northwest and was immortalized in Edgar Allan Poe’s poem “The Raven.” Eagles have long been symbols of power and prestige in many parts of the world, including Europe, where their representations are often seen in heraldry. Native Americans sprinkled eagle down before guests as a sign of peace and friendship, and eagle feathers were commonly used in rituals and headdresses. The resplendent quetzal—the national bird of Guatemala, which shares its name with the currency and is a popular motif in art, fabric, and jewelry—was worshipped and deified by the ancient Mayans and Aztecs. Highly symbolic birds include the phoenix, representing resurrection, and the owl, a common symbol of wisdom but also a reminder of death in Native American mythology. The bird in general has long been a common Christian symbol of the transcendentsoul, and in medieval iconography a bird entangled in foliage symbolized the soul embroiled in the materialism of the secular world.

In modern times the recreational pleasures of bird-watching have grown in tandem with the rise of environmentalism. Evolving from the American and European “shoot-and-stuff” mania of the 19th century, bird-watching became a sportlike activity based on rapid identification—the rarest being the most rewarding—with the aid of binoculars and spotting scopes. The change from shooting to sighting coincided with campaigns, beginning about 1900, to halt the slaughter of wild birds for food and millinery. Bird-watching was advanced by the publication of excellent field guides and improvements in photography and sound recording. By mid-century the watcher’s enjoyable but rather unsophisticated tallying of “year lists” and “life lists” of species personally observed was being augmented, if not replaced, by interest in careful studies of bird behaviour, migration, ecology, and the like. This trend was abetted by bird banding (called ringing in the United Kingdom) and by such organizations as the British Trust for Ornithology and the National Audubon Society, which coordinate professional and amateur observations and efforts with scientific studies.

General features

Birds arose as warm-blooded, arboreal, flying creatures with forelimbs adapted for flight and hind limbs for perching. This basic plan has become so modified during the course of evolution that in some forms it is difficult to recognize.

Among flying birds, the wandering albatross has the greatest wingspan, up to 3.5 metres (11.5 feet), and the trumpeter swan perhaps the greatest weight, 17 kg (37 pounds). In the largest flying birds, part of the bone is replaced by air cavities (pneumatic skeletons) because the maximum size attainable by flying birds is limited by the fact that wing area varies as the square of linear proportions, and weight or volume as the cube. During the Pleistocene Epoch (2.6 million to 11,700 years ago) lived a bird called Teratornis incredibilis. Though similar to the condors of today, it had a larger estimated wingspan of about 5 metres (16.5 feet) and was by far the largest known flying bird.

The smallest living bird is generally acknowledged to be the bee hummingbird of Cuba, which is 6.3 cm (2.5 inches) long and weighs less than 3 grams (about 0.1 ounce). The minimum size is probably governed by another aspect of the surface-volume ratio: the relative increase, with decreasing size, in surface through which heat can be lost. The small size of some hummingbirds may be facilitated by a decrease in heat loss resulting from their becoming torpid at night.

When birds lose the power of flight, the limit on their maximum size is increased, as can be seen in the ostrich and other ratites such as the emu, cassowary, and rhea. The ostrich is the largest living bird and may stand 2.75 metres (9 feet) tall and weigh 150 kg (330 pounds). Some recently extinct birds were even larger: the largest moas of New Zealand and the elephant birds of Madagascar may have reached over 3 metres (10 feet) in height.

The ability to fly has permitted an almost unlimited diversification of birds, so that they are now found virtually everywhere on Earth, from occasional stragglers over the polar ice caps to complex communities in tropical forests. In general the number of species found breeding in a given area is directly proportional to the size of the area and the diversity of habitats available. The total number of species is also related to such factors as the position of the area with respect to migration routes and to wintering grounds of species that nest outside the area. In the United States, Texas and California have the most—approximately 620 for each (the figure varies based on criteria used for inclusion on state lists, such as unconfirmed, accidental, hypothetical, extirpated, and extinct species). More than 920 species have been recorded from North America north of Mexico. The figure for Europe west of the Ural Mountains and including most of Turkey is 514. More than 700 species live in Russia. At least 4,400 species live in North and South America. Although several South American countries boast well over 1,000 species, Costa Rica, with an area of only about 51,000 square km (about 20,000 square miles) and a known avifauna of more than 800 species, probably has the most diversity for its size. Asia accounts for more than 25 percent of the world’s species, with 2,700 species, and Africa slightly less, with about 2,300.

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