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Sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction (dispersal, movement of young away from natal area). Non-migratory birds are said to be resident or sedentary. Approximately 1,800 of the world's 10,000 bird species are long-distance migrants. [17] [18]
A flyway is an operational concept linked to waterfowl whose population one wishes to manage over their entire migration space. [2] Central Asian, East Asian-Australasian, and West Pacific migratory bird flyways. The CAF range is centered on one of the three major wintering areas of waterfowl in the Old World, the Indian subcontinent.
The passing of the Migratory Bird Treaty Act of 1918 in the United States resulted in a need for more information on bird migration. Frederick Charles Lincoln was put in charge and improved methods for trapping and banding, developed record-keeping procedures, recruited banders, fostered international cooperation, and promoted banding as a tool for research and wildlife management.
International cooperation across their migratory range is therefore essential to conserve and protect migratory water birds and the habitats on which they depend. [2] East Asian-Australasian Flyway Partnership (EAAFP) identified 1060 sites as internationally important for migratory birds. [2] These sites are called the Flyway Site Network.
The flyway covers an area of 56,731,881 square kilometres (21,904,302 sq mi) and spans 64 countries from South Africa and Madagascar to Eastern Siberia and Alaska. The indirect route, where the birds fly west and then south rather than directly south, avoids the obstacle of the Tibetan Plateau and the Himalayas.
A bird atlas is an ornithological work that attempts to provide information on the distribution, abundance, long-term change as well as seasonal patterns of bird occurrence and make extensive use of maps. They often involve a large numbers of volunteers to cover a wide geographic area and the methods used are standardized so that the studies ...
GENEVA (Reuters) -There is a risk that the H5N1 bird flu virus, present in many wild birds, may infect cows in countries beyond the United States as they migrate, a World Health Organization ...
The East Atlantic Flyway is a migration route used by about 90 million birds annually, passing from their breeding areas in the United States, Canada, Greenland, Iceland, Siberia and northern Europe to wintering areas in western Europe and on to southern Africa. [1] [2] It is one of the eight major flyways used by waders and shorebirds. [3]