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characteristics of aerial animals

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acquired characteristics

acquired characteristics modifications produced in an individual plant or animal as a result of mutilation, disease, use and disuse, or any distinctly environmental influence. Some examples are docking of tails, malformation caused by disease, and muscle atrophy. The belief in the inheritability of acquired characteristics, proposed by the French biologist Jean-Baptiste Lamarck in 1809, was widely accepted at one time, but is now rejected. Geneticists have affirmed that inheritance is determined solely by the reproductive cells and is unaffected by somatic (body) cells.


From Yahoo Answers

Question:I NEED TO SEE THE PHOTOS OF AERIAL ANIMALS?

Answers:An aerial animal is any creature that spends time in the air, typically in flight. There are several animals like flying squirrels and flying lizards that can glide, but dont truly fly. The only flying mammals are bats, most birds can fly and almost 90% of insects can fly. here are some photos

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Answers:all animals that flies

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Answers:animals that you gotta look up to see

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Answers:The only true aerial vertebrates are birds and bats. Many invertebrates can also fly, such as moths, beetles and butterflies. Larger birds, such as swans, cannot simply lift off; they need to run along the ground first, much like a plane needs a runway to be able to "lift and thrust". However, once in the air, they do not need to flap their wings rapidly like smaller birds in order to stay airborne, so this saves energy. Smaller birds are lighter and can therefore take off more easily, although they need to flap their wings rapidly to stay in the air. When birds flap their wings, it is not up and down as you might think, but in a circular motion. This minimises drag as the bird is effectively 'pushing' down on the air; putting pressure on the air allows birds to propel themselves higher. Hence a bird flaps more to get itself higher than it does when descending. This is a process called aerodynamics. Birds of prey, which need to stay in the air for hours on end in order to hunt, make use of rising columns of air known as "thermals". This is how vultures, for instance, "soar", as they use the thermals to propel themselves higher and keep themselves in the air. Little pressure is needed on the air below since the air is rising, which saves valuable energy. One of a bird's main problems is landing. Most birds effectively glide when descending, flapping their wings as little as possible before landing in a similar way to a plane does: by running along the ground and holding their wings up above their bodies to enable them to "brake". By shielding their bodies from the winds behind them, the air is held back so it does not continue to propel the bird forward and make them crash. Birds such as vultures, which often breed in steep rocky terrain such as cliffs, use a similar, but different, approach. When descending, they aim for a spot slightly lower than where they want to land. At the last minute, when they reach this spot, they fly upwards to the ledge they want to land on, again, using their wings as brakes. Flying upwards requires more energy than flying downwards so is considerably slower, so instead of crashing into the cliff, the birds can slow down at the last minute and land safely. Bats have a very similar skeletal structure in their wing, but the limbs are stretched over flaps of skin, and are featherless. Because most bats do not roost on the ground- this would make them too vulnerable since they cannot run- they take off from above, rather than below. This requires far less energy and keeps them safer from ground predators.

From Youtube

Characteristics of Animal Groups :Check us out at www.tutorvista.com Scientists estimate that there may be between 3 and 30 million species of animals on our planet. If you're just starting to learn about animals and wildlife, it would be an overwhelming task to try and memorize species, one by one. Instead, an understanding of the main groups of animals provides a good foundation for further learning. In this article, we'll take a look at six groups of animals, their characteristics and the types of organisms that belong to each group. Once you have a understanding of these six groups, you'll be on your way to grasping the basic characteristics of virtually every animal on the planet. 1. Invertebrates The first animals to evolve were invertebrates. Fossil evidence of invertebrates dates back to the late Precambrian, 600 million years ago. Invertebrates evolved from single-celled microorganisms. Since then, invertebrates have diversified into countless forms. An estimated 97% of all species are alive today are invertebrates. Invertebrates are not a true taxonomic class of animals, they are united more by what they lack (a backbone) than by shared characteristics. Invertebrates include animal groups such as sponges, cnidarians, flatworms, molluscs, arthropods, insects, segmented worms, and echinoderms as well as many other lesser-known groups of animals. 2. Fish were among the first vertebrates to evolve. The earliest known fishes were the ostracoderms, a now-extinct group of jawless fish that appeared in ...

Blue Skies - Aerial Assassins :Dramatic shots of birds of prey as they hunt for small mammals and fish to feed their young. Meet the creatures for whom the sky is home and soar with them for an eagles eye view to where these animals live the high life.