migratory birds wikipedia - EAS
- Migratory birds: Migratory birds are those birds that migrate, following a fixed route between breeding grounds and shelters each spring and autumn.www.wikigoldlife.com/migratory-bird/
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Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by the availability of food. It … See more
In the Pacific, traditional land finding techniques used by Micronesians and Polynesians suggest that bird migration was observed and interpreted for more than 3,000 years. In Samoan tradition, for example, Tagaloa … See more
The typical image of migration is of northern land birds, such as swallows (Hirundinidae) and birds of prey, making long flights to the tropics. However, many Holarctic wildfowl and finch (Fringillidae) species winters in the North Temperate Zone, … See more
Sometimes circumstances such as a good breeding season followed by a food source failure the following year lead to irruptions in which large … See more
Migration is the regular seasonal movement, often north and south, undertaken by many species of birds. Bird movements include … See more
During nocturnal migration ("nocmig" ), many birds give nocturnal flight calls, which are short, contact-type calls. These likely serve to … See more
Many long-distance migrants appear to be genetically programmed to respond to changing day length. Species that move short distances, however, may not need such a timing … See more
The control of migration, its timing and response are genetically controlled and appear to be a primitive trait that is present even in non … See more
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