Mosquitoes can keep themselves from freezing by replacing the water in their bodies with a chemical called glycerol. It works like an antifreeze and allows them to survive under the snow during the winter. The marshy tundra is a great place for migratory birds like the harlequin duck, sandpipers and plovers. Polar desert: All the wildlife is connected with sea, because there is very little food on land. Vast colonies of seabirds can be found nesting on the cliffs of this ecoregion. Not many animals spend all year there. Alpine biome: Alpine animals adapt to the cold by hibernating, migrating to lower, warmer areas, or insulating their bodies with layers of fat. Animals will also tend to have shorter legs, tails, and ears, in order to reduce heat loss. Alpine animals also have larger lungs, more blood cells and hemoglobin because of the increase of pressure and lack of oxygen at higher altitudes. This is also true for people who have lived on mountains for a long time,
and prolonged drought, possibly the result of manmade global warming. In some years it barely flows at all. The river has a high salt content and declining water quality Deserts Deserts of Australia cover a large portion of the land in Australia. Most of the deserts lie in the central and northwestern part of the country. The Great Victoria Desert is a barren, arid and sparsely populated desert ecoregion in southern Australia. It falls inside the states of South Australia and Western Australia and consists of many small sandhills, grasslands and salt lakes. It is over 700 kilometres (435 miles) wide (from west to east) and covers and area of 424,400 square kilometres. It is the biggest desert in Australia. There are also Great Sandy Desert, Gibson Desert, and Simpson Desert. 5. Climate Rainfall plays a very important part in the lives of the Australian people
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