GPS helping keep track

 
BY DAVID ZIZZO
Published: December 22, 2009

Through Kansas , Missouri , Iowa and Wisconsin , across the Keweenah Peninsula of Michigan and into Canada , Alan Jenkins followed as far as he could.

"That’s where I lost the signal,” he said.

Jenkins, assistant director of the George M. Sutton Avian Research Center near Bartlesville , was tracking a bald eagle. A tiny radio transmitter on the bird’s back emitted a signal that ...


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