The Navigational Precision Of Birds

The Navigational Precision Of Birds

Billions of songbirds migrate every year to different lands thousands of miles away, and the way they reach the exact same place to nest is fascinating and is as if they have precise GPS instruments installed in them.

This mysterious sense of compass direction is due to a ‘magnetic map’ that is very much like the way we use GPS (Cartesian coordinates).

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Adult birds develop navigational maps inside them to help them travel to faraway lands. How this happens is still a mystery and various theories are being considered: infra-sound, smells, and gravity variations.

A theory gathering some evidence is that the earth’s magnetic field forms a grid that is followed by the birds.

Studies done on the reed warbler (Acrocephalus scirpaceus), a Eurasian migratory bird, provide clear evidence of the magnetic field.

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Summary: 

Difference Between GPS and DGPS is that a global positioning system (GPS) is a navigation system that consists of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the receiver’s geographic location.

DGPS stands for Differential Global Positioning System, is an enhacement in GPS that is created to provide more location accuracy. from the 15-meter nominal GPS accuracy to about 10 cm for best implementations.

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