The name of the genus is capitalized, the name of the species is not, and both are italicized. In order to meet the rigorous demands for air consumption that intense living, flight, and song impose on them, birds must have ample and efficient breathing machinery. Not only is their respiratory system the most efficient known among all vertebrates, but it is unique in basic structure.
Humans and other mammals breathe by means of a cul-de-sac respiratory system in which inhaled fresh air is mixed with residual stale air remaining in the dead-end alveoli of the lungs, which can never be completely emptied. Birds, on the contrary, have a complex weight-reducing system of air sacs and interconnecting tubes that make possible a more thorough bathing of the lung cells with fresh air.
This is a very unique bird characteristic. To help supply heavy oxygen demands, the lungs are supplemented by a series of air sacs that let the bird inhale more air than the lungs can hold at one time. These air sacs fill all the available spaces within the body cavity and also contribute to the bird's lightness. Soaring species have air sacs extending to their hollow bones, others have a series of small air sacs paralleling the trachea.
Some diving birds use the reserve air in the sacs while submerged, but deep divers have reduced air sacs to eliminate buoyancy. Bird Vision Vision is the bird's most highly developed sense. Unlike most animals, they see in color. Birds can distinguish objects much farther away than can humans, and their vision is in fact the most highly developed of any animal.
Birds have big eyes. Hawks, eagles, and owls often have eyes actually larger than human's. A unique bird characteristic. Bats possess flying abilities that are, in some ways, more extraordinary those of birds. And there are many thousands of different insect species which can fly, such as dragonflies, mosquitoes, flies, etc. Both mammals i. And there are some species of fish, the Flying Fish, whose fins are shaped like wings. Birds have a modified skeletal structure which enable them to move very quickly.
Is this a unique trait? There are numerous animals whose bones and joints have been modified to allow them to move a great speeds. The Cheetah, for example, has a hip joint which possesses more flexibility than even most other cat species and which enables them to accelerate rapidly and make very fast changes in direction at high speeds.
No, there are many animal groups which lay eggs. Fish, frogs, toads, snakes, alligators and turtles are just a few of the vertebrate species which lay eggs. Then there are all of the millions of insect species which also lay eggs. Many bird species possess a fairly high level of intelligence. Some of the parrots have been eveluated as having problem-solving skills equal to that of a two-year old human child.
The wings of birds that spend a long time in the air, such as the swallow and the albatross, are long, narrow, and pointed. These wings enable very rapid flight without creating drag — a force that slows down the flight speed and requires much greater investment of energy in flight. Large birds, such as the vulture or the pelican, can soar through the air using their long, broad wings.
Soaring, which is a passive form of flight, allows large birds to spend a long time in the air with minimum investment of energy. To fly in the air, a bird must have low weight. Birds have a few features that contribute to their low bodyweight. Firstly, their bones, despite their relative strength, are hollow.
Secondly, their covering of feathers is especially light. Air sacs and efficient breathing: Birds have a unique respiratory system that includes air sacs to increase breathing efficiency: during inhalation, some of the air enters the lungs and some enters the air sacs. During exhalation, the oxygen-rich air in the air sacs enters the lungs. Thus birds receive oxygen-rich air not only during inhalation, but also during exhalation. Eating like a bird — with a beak! Every bird has a beak, which is used to search for food, capture it, tear it and eat it.
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