描写各种动物怎样睡觉的句子
Animal migration refers to the animal due to the breeding, feeding, climate change, migration and other reasons certain distance. Periodic and aperiodic migration migration.Part of migratory birds due to seasonal breeding and breeding grounds yearly return spring and autumn winter moved south to do some horizontal cyclical migration route, each bird migration route unchanged general often migrate along the food-rich areas near water; in North America, for example, there are four main migratory bird migratory paths: (1) the Pacific migration route, the American continent in the West Bank along the Pacific route. (2) Mississippi route along the Mississippi migration. (3) central migration route, along the Rocky Mountains and the line. (4) Atlantic flight route, along the American east coast of the continent bordering the Atlantic Ocean. The terms of East Asia, for example, occurs mainly in the winter migratory birds in autumn and winter, the main path includes: overland route from Siberia, northeastern mainland China, Japan, Korea and other places and then moved to the south coast of the mainland by Taiwan, Indochina or more Borneo in the South, or even Australia and New Zealand region, such as the Shrike. If you pass through the Aleutian sea line Shen Islands, the islands of Japan, Okinawa, Taiwan, the Philippines and then south to the Flying Islands, Borneo, even as far as Australia, button region; the spring, migratory birds will return to northern breeding grounds, so cycle once a year. East Asia summer migratory birds choose the opposite of winter season each year by the South Peninsula of Guangdong, Fujian coast north to Taiwan and other areas of summer, such as azaleas. Other migratory routes as well as East Africa - West routes. Identify the direction of the main bird migration changes according to celestial, rely on the Earth's magnetic field, or along the geographic line memories and the like.Fish due to seasonal breeding and foraging and other factors make certain direction cyclical migration can be divided into:① reproductive migration, such as deep sea eels fresh water to spawn in the reproductive stage tour, far land called migration.② juvenile migratory fish live in the ocean, reproductive swim to freshwater spawning, hatching juveniles following spring with the melting of snow and ice into the ocean swim.③ foraging migratory fish to migrate into the cluster foraging and plankton prey rich waters.④ season migratory fish due to sea temperature changes with the seasons and the migration to a suitable temperature waters.Mammals due to seasonal breeding and feeding and other reasons make periodic migrations, such as caribou winter south to northern coniferous forest, spring returns foods rich northern tundra. In addition to the horizontal direction but also have a migration migrate vertically. Such as mountain cold season, foraging animals often move to the lower. Many deep-sea fish and invertebrates of the year in the deep and shallow water, respectively, to spend part of the time.修改建议
世界上有哪些动物有迁徙行为，并简要写出它们迁徙的原因
believe otherwise is to take on a poi
