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Most birds winter within the southern parts of the breeding range, but smaller numbers cross the Mediterranean into Africa or travel over the mountains of Malaysia into Southeast Asia. Kingfishers migrate mainly at night, and some Siberian breeders must travel at least 3,000 km (1,900 mi) between the breeding sites and the wintering areas. [7]
"80% of our migratory birds here in North America are actually migrating at night," he said. "A large impact that humans actually have on birds during migration is with the light that we produce ...
Nocturnal migration can be monitored using weather radar data, [40] allowing ornithologists to estimate the number of birds migrating on a given night, and the direction of the migration. [41] Future research includes the automatic detection and identification of nocturnally calling migrant birds.
Here are spring bird migration statistics for Chatham County, based on BirdCast estimates: Total migrating birds: 40 million Most in flight at one time: 228,000 at 2:10 a.m. on May 2
Mortality on wintering grounds: Unreasonably cold temperatures on the wintering grounds kills thousands of birds, resulting in 30-90% population declines of migratory birds. For example, between 27000 and 62000 ducks, mostly tufted duck and common pochard , starved to death during a very cold winter in March 1986.
Warmer springs bring changes in bird migration. Spring’s arrival has always shown variation. It may be early. It may be late. But researchers say the data studied over several decades shows ...
Coot species that migrate do so at night. The American coot has been observed rarely in Britain and Ireland, while the Eurasian coot is found across Asia, Australia and parts of Africa. In southern Louisiana, the coot is referred to by the French name "poule d'eau", which translates into English as "water hen".
During the late summer and early fall, hummingbirds will migrate back to warmer weather after arriving in the Midwest earlier this spring. Bird-watchers can expect to see hummingbirds — the tiny ...