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The influence of geomagnetism on the behavior of wild ducks
CHODIL, Josef
This work consists in an influence of the earth?s magnetic field to the orientation of the landing of wild ducks on a water surface. Some of the animal species perceive the magnetic field and they can use it for their orientation (migratory birds, bats, underground rodents, turtles and newts) Another variant of perceiving the magnetic field are the natural reactions (move tendency of cattle and deer at the pasturage, the orientation of carp in vats). Landing of wild ducks to a water surface is an unwilled reaction of perceiving the magnetic field. The material for this work was gained by the direct observation in nature. Observation was realized during the different terms of day and during the weather changes. The following data were written down: arrival, landing preparation, whole landing, wind power and the direction, weather conditions, disturbing influences, the position of sun, the distance of the bank during the landing. The analysis of acquired information proved the wild ducks prefer the southeast direction during the landing on a water surface.
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