Nocturnal autumn bird migration at Falsterbo, South Sweden
نویسندگان
چکیده
منابع مشابه
Flight Behaviour of Passerines on Nocturnal Migration
Many passerines migrate during the night and at high altitudes, making their migration difficult to observe. By using tracking radars we have been able to make exact observations of the flight behaviour of passerines on nocturnal migration, which has enabled us to test several hypotheses about adaptive values and constraints regarding migratory behaviour in different ecological contexts. We hav...
متن کاملHeritability of the timing of autumn migration in a natural bird population.
In recent decades, global temperature has increased at an unprecedented rate. This has been causing rapid environmental shifts that have altered the selective regimes determining the annual organization of birds. In order to assess the potential for adaptive evolution in the timing of autumn migration, we estimated heritabilities of the onset of migratory activity in a southern German blackcap ...
متن کاملAn assessment of spatio-temporal relationships between nocturnal bird migration traffic rates and diurnal bird stopover density.
BACKGROUND Daily magnitudes and fluxes of landbird migration are often measured via nocturnal traffic rates aloft or diurnal densities within terrestrial habitats during stopover. However, these measures are not consistently correlated and at times reveal opposing trends. For this reason we sought to determine how comparison methods (daily magnitude or daily flux), nocturnal monitoring tools (w...
متن کاملTesting avian compass calibration: comparative experiments with diurnal and nocturnal passerine migrants in South Sweden
Cue-conflict experiments were performed to study the compass calibration of one predominantly diurnal migrant, the dunnock (Prunella modularis), and two species of nocturnal passerine migrants, the sedge warbler (Acrocephalus schoenobaenus), and the European robin (Erithacus rubecula) during autumn migration in South Sweden. The birds' orientation was recorded in circular cages under natural cl...
متن کاملSouth West Surgical Club Autumn Meeting 1992
s of papers given at the Autumn Meeting held at the Royal United Hospital Bath October 23rd and 24th 1992 COLOUR DUPLEX SCANNING IN THE INVESTIGATION OF PERIPHERAL VASCULAR
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ژورنال
عنوان ژورنال: Journal of Avian Biology
سال: 2001
ISSN: 0908-8857,1600-048X
DOI: 10.1111/j.0908-8857.2001.320306.x