In the fall of 2007, a purple martin carrying a miniature locating device on its
back made its annual
migration from northwest Pennsylvania to the Brazilian rain forest in just 43
days.
Then, to the astonishment of songbird scientists, it made the 4,300-mile return
trip to its spring breeding
grounds in less than two weeks, averaging 311 miles per day - three times faster
than previous estimates.
Purple Martin Migration
