Orientation scatter of free-flying nocturnal passerine migrants: components and causes

Article Abstract:

The variation in concentration of orientation among nocturnally migrating passerine birds is studied. The high concentration of heading directions of free-flying migrants is in contrast to the widely scattered distributions observed in orientation experiments with caged birds.

Passeriformes, Perching birds

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Do migratory flight paths of raptors follow constant geographical or geomagnetic courses?

Article Abstract:

A study to determine the track direction usually followed by raptors while migrating over homogeneous topography is presented. Raptors follow a constant geographical course rather than a constant geomagnetic course.

United States, Denmark, Birds of prey, Raptors (Birds), Bird navigation

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Temporal and spatial patterns of repeated migratory journeys by ospreys

Article Abstract:

Using data from satellite monitored journeys of ospreys (Pandion haliaetus) between Europe and West Africa the migration timings and flight patterns of the birds were studied.

Usage, Birds, Spatial behavior in animals, Animal spatial behavior, Ospreys, Osprey, Animal radio tracking, Animal spatial behaviour

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