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The mallard is widely distributed across the Northern and Southern Hemispheres; in North America its range extends from southern and central Alaska to Mexico, the Hawaiian Islands, [54] across the Palearctic, [55] from Iceland [56] and southern Greenland [54] and parts of Morocco (North Africa) [56] in the west, Scandinavia [56] and Britain [56 ...
Migration is the regular seasonal movement, often north and south, undertaken by many species of birds. Migration is marked by its annual seasonality and movement between breeding and non-breeding areas. [16] Nonmigratory bird movements include those made in response to environmental changes including in food availability, habitat, or weather.
Many of these migrations are north-south, with species feeding and breeding in high northern latitudes in the summer and moving some hundreds of kilometres south for the winter. [17] Some species extend this strategy to migrate annually between the Northern and Southern Hemispheres.
Waterfowl flyways in the United States. The Atlantic Flyway is in violet. The Atlantic Flyway is a major north-south flyway for migratory birds in North America. The route generally starts in Greenland, then follows the Atlantic coast of Canada, then south down the Atlantic Coast of the United States to the tropical areas of South America and the Caribbean. [1]
Typically, hummingbirds migrate South in August or September, where they spend the winter in Central America or Mexico. They are expected to return to Ohio in the spring of 2025, likely in the ...
In 2014, birds migrating from Europe brought H5N8 viruses to North America. Aggressive culling, resulting in the deaths of more than 50 million birds, stopped that outbreak and the US remained ...
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.
Mallards, both domestic and wild in particular are notorious hybridizers, know to frequently hybridize within the mallard complex and even outside of Anas. The willingness to hybridize has concerned conservationists as the gene flow from the mallard may pollute pure populations of more vulnerable species such as the Mexican duck. [ 2 ]