Some orientational influences of nonvisual, terrestrial electromagnetic fields.
D000818:Animals; D001522:Behavior, Animal; D001683:Biological Clocks; D004560:Electricity; D008027:Light; D008280:Magnetics; D009949:Orientation; D011830:Radiation Effects; D012908:Snails / Q000502:physiology; D014419:Turbellaria / Q000502:physiology*