You are watching: Which of the following traits support(s) advanced flight capabilities in modern birds?
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Since earliest times birds have actually been not just a product but likewise a social resource. Bird numbers were created by prehistoric people in the Lascaux Grotto of France and also have featured prominently in the mythology and also literature of cultures throughout the world. Long prior to ornithology was practiced as a science, interest in birds and the understanding of them uncovered expression in conversation and stories, which then crystallized into the records of general culture. Old Egyptian hieroglyphs and also paintings, because that example, encompass bird figures. The bible refers come Noah’s usage of the raven and dove to bring him information around the proverbial Flood.
What bird inhabits east Australia and also may hang roughly in groups of 12? What bird to be immortalized by Gilbert and Sullivan in The Mikado? Test her knowledge. Take the quiz.
Various bird attributes, actual or imagined, have actually led to your symbolic use in language together in art. Aesop’s fables abound in bird characters. The Physiologus and its descendants, the bestiaries of the middle Ages, save on computer moralistic works that usage birds as icons for conveying ideas yet indicate tiny knowledge of the bird themselves. Mythological beliefs around birds more than likely took organize as early on as acknowledgment of the reality that some birds were an excellent to eat. Australian Aborigines, because that example, drive the black-and-white flycatcher from camp, lest the overhear conversation and carry the story to enemies. Peoples of the Pacific Islands saw frigate bird as signs of the Sun and also as carrier of omens and also frequently shown them in their art. The raven—a common symbol the dark prophecy—was the most important creature to the indians of the Pacific Northwest and also was immortalized in Edgar Allan Poe’s poem “The Raven.” Eagles have actually long been icons of power and prestige in countless parts of the world, including Europe, where their depictions are regularly seen in heraldry. Native Americans sprinkled eagle down before guests together a authorize of peace and friendship, and eagle feather were typically used in rituals and headdresses. The resplendent quetzal—the national bird the Guatemala, which share its name with the currency and also is a popular motif in art, fabric, and jewelry—was worshipped and also deified through the ancient Mayans and also Aztecs. Highly symbolic birds incorporate the phoenix, representing resurrection, and also the owl, a usual symbol of wisdom but likewise a reminder of death in aboriginal American mythology. The bird in general has long been a common Christian symbol of the transcendent soul, and in medieval iconography a bird entangled in foliage symbolized the soul embroiled in the materialism of the secular world.
In contemporary times the entertain pleasures of bird-watching have grown in tandem v the climb of environmentalism. Evolving indigenous the American and also European “shoot-and-stuff” mania that the 19th century, bird-watching became a sportlike activity based on quick identification—the rarest being the most rewarding—with the help of binoculars and also spotting scopes. The change from shoot to sighting corresponded with campaigns, beginning about 1900, come halt the slaughter that wild birds because that food and also millinery. Bird-watching was advanced by the publishing of excellent field guides and also improvements in photography and also sound recording. Through mid-century the watcher’s enjoyable but rather unsophisticated tallying that “year lists” and “life lists” of types personally observed was being augmented, if no replaced, by interest in mindful studies of bird behaviour, migration, ecology, and also the like. This tendency was abetted through bird banding (called ringing in the united Kingdom) and by such institutions as the British trust for Ornithology and also the national Audubon Society, which name: coordinates professional and amateur observations and efforts with clinical studies.
Downy woodpecker (Dendrocopos pubescens).
Kenneth and also Brenda Formanek
Birds occurred as warm-blooded, arboreal, paris creatures v forelimbs adapted for flight and also hind limbs for perching. This straightforward plan has end up being so modified during the food of development that in some creates it is daunting to recognize.
Pigeon skeleton, through the near wing raised and the far wing omitted.
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Among flying birds, the wandering albatross has the best wingspan, as much as 3.5 metres (11.5 feet), and also the trumpeter swan probably the best weight, 17 kg (37 pounds). In the biggest flying birds, component of the bone is changed by air caries (pneumatic skeletons) due to the fact that the maximum size attainable by flying bird is limited by the reality that wing area varies together the square of linear proportions, and also weight or volume together the cube. Throughout the Pleistocene epoch (2.6 million to 11,700 years ago) live a bird called Teratornis incredibilis. Though similar to the condors that today, it had actually a larger estimated wingspan of about 5 metres (16.5 feet) and was by much the largest known flying bird.
The the smallest living bird is generally acknowledged to it is in the punishment hummingbird that Cuba, which is 6.3 centimeter (2.5 inches) long and also weighs less than 3 grams (about 0.1 ounce). The minimum dimension is most likely governed by one more aspect the the surface-volume ratio: the family member increase, v decreasing size, in surface ar through which heat can be lost. The little size of part hummingbirds might be helped with by a diminish in warmth loss result from their becoming torpid in ~ night.
When birds shed the power of flight, the limit on their maximum size is increased, as have the right to be checked out in the ostrich and other ratites such together the emu, cassowary, and also rhea. The ostrich is the biggest living bird and may was standing 2.75 metres (9 feet) tall and weigh 150 kg (330 pounds). Some recently extinct birds were even larger: the biggest moas of new Zealand and the elephant birds of Madagascar may have actually reached end 3 metres (10 feet) in height.
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The capability to fly has actually permitted an almost unlimited diversification the birds, so the they space now discovered virtually all over on Earth, from occasional stragglers over the polar ice caps to facility communities in tropical forests. In general the number of species found breeding in a provided area is straight proportional to the size of the area and the diversity of habitats available. The total number of species is likewise related come such determinants as the position of the area with respect to migration routes and to wintering grounds of species that nest outside the area. In the joined States, Texas and California have actually the most—approximately 620 because that each (the number varies based on criteria used for inclusion on state lists, such together unconfirmed, accidental, hypothetical, extirpated, and also extinct species). An ext than 920 types have been taped from phibìc America phibìc of Mexico. The figure for Europe west the the Ural Mountains and also including most of Turkey is 514. An ext than 700 species live in Russia. At least 4,400 types live in North and also South America. Although numerous South American countries boast well over 1,000 species, Costa Rica, through an area the only around 51,000 square km (about 20,000 square miles) and also a well-known avifauna of much more than 800 species, probably has actually the most diversity for its size. Asia accounts for much more than 25 percent the the world species, through 2,700 species, and Africa slightly less, with about 2,300.