منابع مشابه
Monitoring bird migration by weather radar
Spatiotemporal information on bird migration is of invaluable use to scientists and society alike, but so far no sensor networks have been established that can monitor bird movement continuously over large areas. In aviation bird migration information is important for improving flight safety. Especially military low level flying has a high risk of en-route bird strikes and spatial bird migratio...
متن کاملWeather and bird migration Norman Elkins
© British Birds 98 • May 2005 • 238-256 ABSTRACT Bird migration in and through Britain and Ireland shows great variation, both seasonally and annually. Much depends on atmospheric conditions, which can equally hinder and assist migration, both on a broad scale (the distribution, extent, intensity and movement of pressure patterns), and at a local level (temporal and spatial changes in wind, vis...
متن کاملThe Evolution of Differential Bird Migration
of Baker's View of Avian Migration Baker (197S) defines migration to include any non-accidental movement by a metazoan from one spatial unit to another' He assumes It at migrations have evolved because they are, or historically have been' "J"piitat the level of individual selection' (As he puts it, chickens cross the road because they find conditions sufficiently better on the other side to hav...
متن کاملIndividuality in bird migration: routes and timing.
The exploration of animal migration has entered a new era with individual-based tracking during multiple years. Here, we investigated repeated migratory journeys of a long-distance migrating bird, the marsh harrier Circus aeruginosus, in order to analyse the variation within and between individuals with respect to routes and timing. We found that there was a stronger individual repeatability in...
متن کاملA polar system of intercontinental bird migration.
Studies of bird migration in the Beringia region of Alaska and eastern Siberia are of special interest for revealing the importance of bird migration between Eurasia and North America, for evaluating orientation principles used by the birds at polar latitudes and for understanding the evolutionary implications of intercontinental migratory connectivity among birds as well as their parasites. We...
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ژورنال
عنوان ژورنال: The Auk
سال: 1884
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4067277