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Weather conditions influence bird flight behavior in ways that make them more or less susceptible to collisions. [22] Conditions which reduce visibility, such as fog, rain, or snow, can disorient birds, especially those that migrate at night and rely on visual cues.
The largest numbers of strikes happen during the spring and fall migrations. Bird strikes above 500 feet (150 m) altitude are about 7 times more common at night than during the day during the bird migration season. [24] Large land animals, such as deer, can also be a problem to aircraft during takeoff and landing.
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.
Federal investigators have released a preliminary report into the helicopter crash that killed three Air Evac crew members last month, revealing evidence of a possible bird strike.. While the ...
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31 December 2010, in Beebe, Arkansas. 3,000 red-winged blackbirds and European starlings died. Arkansas state wildlife authorities first received reports on 31 December 2010, shortly before midnight. Further investigation revealed the birds fell over a one-mile area of Beebe, with no other dead birds found outside that concentrated zone.
An Alaskan polar bear has become the first of its species to reportedly die from avian influenza, also known as HBN1, after the disease was first detected in the US in January of 2022.
The winter wren (Troglodytes hiemalis) is a very small North American bird and a member of the mainly New World wren family Troglodytidae.The species contained the congeneric Pacific wren (Troglodytes pacificus) of western North America and Eurasian wren (Troglodytes troglodytes) of Eurasia until they were split in 2010.