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A flock of barnacle geese during autumn migration. Examples of long-distance bird migration routes. Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Migration is inherently risky, due to predation and mortality.
The basal bird Archaeopteryx, from the Jurassic, is well known as one of the first "missing links" to be found in support of evolution in the late 19th century. Though it is not considered a direct ancestor of modern birds, it gives a fair representation of how flight evolved and how the very first bird might have looked.
Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans. The cause of migration may be local climate, local availability ...
Description and taxonomy. Juvenile. The Arctic tern is a medium-sized bird around 33–36 cm (13–14 in) from the tip of its beak to the tip of its tail. The wingspan is 76–85 cm (30–33 in). [19] The weight is 86–127 g (3.0–4.5 oz). The beak is dark red, as are the short legs and webbed feet.
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]
Ornithology is a branch of zoology that concerns the study of birds. [1] Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. [2] It has also been an area with a large contribution made by amateurs in terms of time, resources, and financial support.
1858 – Alfred Newton forms the British Ornithologists' Union. 1859 – Hermann Schlegel sends Heinrich Agathon Bernstein to collect birds in New Guinea. 1861 – Fossil of Archaeopteryx found in Germany supports link between dinosaurs and birds. 1861 – Museum Godeffroy founded in Hamburg.
Hummingbirds cross Gulf of Mexico, travel more than 3,500 miles. About 20 of the world's 363 known hummingbird species call the U.S. home, according to the Cornell Lab of Ornithology.. Most are ...