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The Arctic tern has the longest migration journey of any bird: it flies from its Arctic breeding grounds to the Antarctic and back again each year, a distance of at least 19,000 km (12,000 mi), giving it two summers every year. [18] Bird migration is controlled primarily by day length, signalled by hormonal changes in the bird's body. [19]
Many birds migrate in flocks. For larger birds, it is assumed that flying in flocks reduces energy costs. The V formation is often supposed to boost the efficiency and range of flying birds, particularly over long migratory routes. All the birds except the first fly in the upwash from one of the wingtip vortices of the bird ahead.
Animal navigation is the ability of many animals to find their way accurately without maps or instruments. Birds such as the Arctic tern, insects such as the monarch butterfly and fish such as the salmon regularly migrate thousands of miles to and from their breeding grounds, [1] and many other species navigate effectively over shorter distances.
Bird flu 'ruffles feathers' of cattle in Texas, Kansas, and New Mexico. Migratory birds can have an outsized impact on the human world as well. In March, it was reported by the United States ...
While Parker birds for fun in Maine, for work he monitors two migratory bird species, the Eastern whippoorwill and the common nighthawk, one of the longest distance migratory birds in North America.
The average bird meal consisted of 90.8% honey bees and 9.2% beetles. [28] Predation is more likely when the bees are queening or during the peak of migration, from late March till mid-April, and in mid-September. Hives close to or under trees or overhead cables are at increased risk as the birds pounce on flying insects from these perches. [29]
The average bird meal consisted of 90.8% honey bees and 9.2% beetles. [11] Predation is more likely when the bees are queening or during peak migrations, from late March till mid-April, and in mid-September. Hives close to or under trees or overhead cables are also at increased risk as the birds pounce on flying insects from these perches. [12]
A high-elevation meadow in the Oregon Coast Range is helping uncommon wildlife like purple martins, bats and bees. Walker Meadows is around 13 miles west of Veneta and at an elevation of 2,300 feet.