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Orientation Behavior of Night-Migrating Birds (European Robins) during Late Afternoon and Early Morning Hours

Wolfgang Wiltschko ; Hiltrud Höck 1972

The Wilson Bulletin, 84(2)

[1. The birds' activity during early morning hours is concentrated in migratory direction, but only when the birds showed migratory activity in the night before. 2. When the magnetic field was artificially changed (magnetic north at 115° in ESE)[...]

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Outdoor Experiments with Migrating European Robins in Artificial Magnetic Fields

Wolfgang Wiltschko ; Hiltrud Höck ; Friedrich W. Merkel 1971

Zeitschrift für Tierpsychologie, 29(4)

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