|Cruise passenger, do you want to go birding?
Transportation is available from San Juan,
Mayagüez, and Ponce ports.
Many birds, especially those that migrate, can use the "Earth's magnetic
field to stay their course during long flights. Scientists still aren't sure how
they do it, but one recent study suggests birds might have a form of
synesthesia that lets them "see" the planet's magnetic lines as patterns
Updated May 18, 2011.
|of color or light that is overlaid on their visual surroundings. Humans must rely on familiar landmarks or the sun's position to
locate North, and many can't even manage that.
Source: Live Science, http://www.livescience.com/animals/top10_animal_senses-1.html [August 12 2007].
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