To find out what the magnetic declination in your location is, the US National ... There is also this useful site that lets you pick your loction on a map and tells you the magnetic declination.

Biologists have identified, for the first time, that mature reed warblers are able to detect the declination from magnetic north, and use the scale of the declination or change from true north to ...

Many migratory birds use Earth’s magnetic field as a compass, but some can also use information from that field to determine more or less where they are on a mental map. Eurasian reed warblers ...

I n the days since GPS was invented, many of us have lost the skill of navigating by a good old compass and map. As a family ...

And while declination varies consistently in Europe and the US, if you go east, it does not give such a clear picture of where the bird is, with many values potentially indicating more than one ...

A recent pamphlet by D. L. Hazard (“Magnetic Declination in the United States, 1930” U.S. Dept. of Commerce, Coast and Geodetic Survey, Washington; Serial 540, 1932; ...

Reed warblers have a sense for magnetic declination Date: August 17, 2017 Source: Cell Press Summary: Researchers recently showed that migratory reed warblers depend on an internal geomagnetic map ...

THE Meteorologische Zeitschrift for April contains an interesting article by Prof. G. Hellmann on the knowledge of the magnetic declination before the time of Christopher Columbus. Some years ago ...

Perhaps the most confounding aspect of a navigator’s life at sea was trying to account for the phenomenon of magnetic variation (also known as magnetic declination): the angle between magnetic north ...

And while declination varies consistently in Europe and the US, if you go east, it does not give such a clear picture of where the bird is, with many values potentially indicating more than one ...