What is the Great Egret's importance to the environment?
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Great Egrets eat fish, frogs, and insects. They in turn provided sustenance for the other denizens of the wetlands such as perhaps a submerged alligator that takes it by surprise. More importantly they are beautiful animals attracting bird-watchers from all over the world to visit the habitats of these animals. This puts pressure on the community as these tourists provide revenue for hotels and businesses to protect the wetlands so the tourists will keep coming. So indirectly by just being a beautiful bird it helps out all the creatures of their habitats.
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The natural causes of animal endangerment are due to Nature.. The man made ones are due to man...\n\nAnd while I'm helping you a Meter is exactly a meter long.. OK.\n\nHope that helped
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Necessary for who?  It is certainly necessary for humans.  If it wasn't for humans, humanity in general wouldn't exist.  Maybe the rest of the planet might not miss us much, but I certainly would.\n\nWhile our presence and proliferation certainly does have a detrimental effect on many other organisms and ecosystems, it is because we create our own ecosystem.  Not many people really think about, but human cities and even rural developments have their own ecology and associated plant and animal life that thrives in contact with humans.\n\nSpecies such as rats, cockroaches and pigeons are the obvious faunal assemblage associated with human activity, but there are other species of animals that have become far more successful in association with humanity than they would otherwise have been.  Cats and dogs are far more numerous and widespread than their wild counterparts, as are chickens, sheep, cows and all of our domestic animals.\n\nThe crop species, like wheat, corn, rice and other have also benefited immensely from human cultivation.  The wild counterparts of broccoli and banana are not nearly as successful.\n\nThere are also species who have been able to expand their range as the human ecosystem pushes competitors farther afield.  Coyotes, raccoons, opossums, tree squirrels, house sparrows, starlings, and even white tailed deer have all benefited as the human ecosystem takes over what was formerly plains or forest ecosystem.  Other species like elms, palm trees, oaks and ash used to line our city streets have also expanded their range.\n\nWhile it's not exactly great for biodiversity, the human ecosystem does certainly benefit some organisms.  Without us Plasmodium (the protozoan that causes Malaria) wouldn't be nearly as successful as it is.\n\nSo the Earth itself would certainly survive quite nicely without us, but that entire ecosystem of cows, wheat, cockroaches and kitty cats would be wiped out without us.  In many ways, we are a keystone species in our ecosystem.  It's just too bad that we seem to be insistent on replacing EVERY other ecosystem with our own.
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A wonderful bird is the pelican,\nIts beak can hold more than its belly can.\n\n:)
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Over here on the Left Coast, on the Altamont Pass, there are windmill farms, wind power electricity generation to cut down on emissions.\n\nEnvironmentalists are suing to shut down the wind farms to stop the massive blades from killing the migratory birds.\n\nUseful idiots.
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Cool question. They are gregarious (like groups) wading birds related to other large wading birds such as \nBoatbills, Shoebills, Hammerkops, storks, ibises and spoonbills.\n\nYou can find the scientific classification and their spot in the bird family tree at the link below!
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this question's kind of too big for a full answer on yahoo answers... but i would suggest you start with wikipedia and then follow links to the bits and pieces that interest you. (e.g. looking up a particular species that you want to use as an example). there are heaps of reasons birds migrate--seasonality of food source, mating, nesting site being overly far from a constant food source, etc... really, just start with wiki to get a basis and then hunt down the specifics. there are heaps of birdwatchers sites which will have nice pix on them too if you google them. good luck.
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interaction of man with the environment is definitely essential for his survival.but the important thing is  not to exploit it.man should somewhere become satisfied and draw the line.man's insatiable quest for everything is leading to the exploitation of the environment and ultimately environmental pollution.
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A transgenic virus carried by birds and the birds unaffected by it. You should be writing horror stories. Click the link below.
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Hi,\n The standard categories for endangered species are set by an international organization called IUCN, the World Conservation Union. The UICN categorizes species into categories according to their level of extinction danger, on the basis of several criteria.  The UICN issues a Red List that includes all the endangered species, so it's the best place to search for the information you need.\nIUCN site:\nhttp://iucn.org\n\nSome background information, including the definition of the categories:\nhttp://www.iucn.org/themes/ssc/redlists/background_EN.htm\n\nAnd here's the actual Red List:\nhttp://www.redlist.org/\n\nWith respect to passenger pigeons, yes, the species (called Ectopistes migratorius) went extinct in the wild in 1900, and the last captive animal died in 1914. \nSource: \nhttp://www.redlist.org/search/details.php?species=7031&tab=summ
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Oh, the irony.  After a little girl flies halfway across the country in a ultralite in order to lead Canada Geese back from extinction, they are now going to kill us all with their poop.\n\nI think, once they hit the US, we had better start keeping our shoes at the door.  I know ducks & geese are pretty common here, and they are going to be carriers.  And that doesn't even take into account how many times ducks get into the pool.\nIs chlorine antiviral at pool sanitation levels?\nI hope some other country full of ducks & geese figures it out before it gets here.
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B - Habitat degradation would be the closest I would say. \n\nBut, environmental degradation would be a better answer:\nIt is related to the deterioration of the environment both in terms of quantity and extinction of some wildlife species and quality like air, water or land pollution.
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I don't really think they're essential to the global eco-system. If you could magically turn all deserts into plains or something, there are certain animals that you would drive to extinction, but I don't think the Earth would suffer because of it..... BUT humans would then populate vast areas (like the Sahara) that were previously uninhabitable, and pollute the Earth even more... so if you look at it that way, they're important because they limit human expansion.
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INTRODUCTION\nPollution, contamination of Earth’s environment with materials that interfere with human health, the quality of life, or the natural functioning of ecosystems (living organisms and their physical surroundings). Although some environmental pollution is a result of natural causes such as volcanic eruptions, most is caused by human activities.\n\nThere are two main categories of polluting materials, or pollutants. Biodegradable pollutants are materials, such as sewage, that rapidly decompose by natural processes. These pollutants become a problem when added to the environment faster than they can decompose (see Sewage Disposal). Nondegradable pollutants are materials that either do not decompose or decompose slowly in the natural environment. Once contamination occurs, it is difficult or impossible to remove these pollutants from the environment. \n\nNondegradable compounds such as dichlorodiphenyltrichloroethane (DDT), dioxins, polychlorinated biphenyls (PCBs), and radioactive materials can reach dangerous levels of accumulation as they are passed up the food chain into the bodies of progressively larger animals. For example, molecules of toxic compounds may collect on the surface of aquatic plants without doing much damage to the plants. A small fish that grazes on these plants accumulates a high concentration of the toxin. Larger fish or other carnivores that eat the small fish will accumulate even greater, and possibly life-threatening, concentrations of the compound. This process is known as bioaccumulation.\n\nTYPES OF POLLUTION\nPollution exists in many forms and affects many different aspects of Earth’s environment. Point-source pollution comes from specific, localized, and identifiable sources, such as sewage pipelines or industrial smokestacks. Nonpoint-source pollution comes from dispersed or uncontained sources, such as contaminated water runoff from urban areas or automobile emissions.\n\nThe effects of these pollutants may be immediate or delayed. Primary effects of pollution occur immediately after contamination occurs, such as the death of marine plants and wildlife after an oil spill at sea. Secondary effects may be delayed or may persist in the environment into the future, perhaps going unnoticed for many years. DDT, a nondegradable compound, seldom poisons birds immediately, but gradually accumulates in their bodies. Birds with high concentrations of this pesticide lay thin-shelled eggs that fail to hatch or produce deformed offspring. These secondary effects, publicized by Rachel Carson in her 1962 book, Silent Spring, threatened the survival of species such as the bald eagle and peregrine falcon, and aroused public concern over the hidden effects of nondegradable chemical compounds.\n\nA  Air Pollution \nHuman contamination of Earth’s atmosphere can take many forms and has existed since humans first began to use fire for agriculture, heating, and cooking. During the Industrial Revolution of the 18th and 19th centuries, however, air pollution became a major problem. As early as 1661 British author and founding member of the British Royal Society John Evelyn reported of London in his treatise Fumifugium, “… the weary Traveller, at many Miles distance, sooner smells, than sees the City to which he repairs. This is that pernicious Smoake which fullyes all her Glory, superinducing a sooty Crust or Furr upon all that it lights.…”\n\nUrban air pollution is commonly known as smog. The dark London smog that Evelyn wrote of is generally a smoky mixture of carbon monoxide and organic compounds from incomplete combustion (burning) of fossil fuels such as coal, and sulfur dioxide from impurities in the fuels. As the smog ages and reacts with oxygen, organic and sulfuric acids condense as droplets, increasing the haze. Smog developed into a major health hazard by the 20th century. In 1948, 19 people died and thousands were sickened by smog in the small U.S. steel-mill town of Donora, Pennsylvani
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to make sure that our planet doesnt get polluted so much with trash, and to conserve more of our resources. duh.
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The prairie vole, the Greater Prairie Chickens, and the wild Whooping Crane in this display were once abundant in Louisiana. Whooping Cranes used to breed and nest from Canada all the way to Louisiana. They stood close to five feet tall, with beautiful white plumage. They were often killed for feeding on grains in farmers¹ fields, or by hunters who did not realize they were endangered. As the Whooping Crane population became close to extinction, biologists had to intervene to save them. By 1954 there were only 25 of these birds left. Today the population is growing, but there are still only about 100 - a number that one major natural disaster could wipe out. \n\nBird watching, photography and sight-seeing are encouraged year round. Fall and winter months offer the best opportunities to observe flocks of migrating geese and ducks. Spring and summer are the best times to see wading and shore birds. Songbirds can be observed passing through the area on their spring and fall migrations. A bird checklist is available at the visitor center.\n\nHenslow’s Sparrow
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It would certainly matter if it were a different animal- I could do that without it significantly hurting my career, but I would lose a lot of time doing the things I love- the bald eagle would be a tough call, since it's so emotionally evocative.  To save gorillas, certainly- Algae, without a second thought-spotted owl, no way.  For me it would depend on the importance of the animal to the overall ecosystem, to the survival of humans as a species, and my own emotional response to the animal.  I doubt losing the bald eagle would have a terribly significant effect on the ecosystem compared to, for example, the rabbit.  Losing gorillas would likely have almost no effect on the ecosystem in general, but they are so much like us, and have such a close link and intelligence, that I would hate to lose them.  The trauma done to the ecosystem with a loss of algae would be unimaginable-Human probably wouldn't survive it.  Spotted owl?  There are very few of them, the niche is already taken by others which would move in to replace them, they have no discernible effect on human life, and I have no emotional attachment to them.  This may all seem cold, but it's how humans are-It's why we use pictures of cute baby seals, instead of salamanders, to elicit donations.