About the Bald Eagle Migration Study
(Back to Bald Eagle Home Page)
Background
For the sixth season in a row, New York biologist Peter Nye will share satellite
telemetry data with students as he tracks bald eagles back to their nests in Canada.
In 1995 one bird flew all the way to Labrador from New York's Delaware River. Students
will participate in an on-line guessing contest and predict the location of this
eagle's nest. To guide their guess they'll analyze satellite data collected during
the springs of '94, '95, '96, '97 and '98 as well as banding data from other New
York eagles.
For a second season, additional information will also be provided on western eagles
being tracked in Washington State by biologist Jim Watson. These western eagles breed
in British Columbia, Alaska, the Yukon, and the Northwest Territories, and data on
these birds will provide students with a great opportunity to compare and contrast
the two eagle migrations. Students will explore how weather systems affect each eagle's
journey through real-time weather lessons. They'll research the eagle's diet and
Canada's climate, and then estimate when sufficient food would become available there.
Nye believes the timing of an eagle's departure from New York is a clue to its
ultimate destination. The further north the eagle's nest, he theorizes, the later
it leaves New York. This suggests the eagle has an incredible sense of timing. Which
set of eagles do you suppose will migrate first? Why?
Recently removed from the endangered species list, the eagle's recovery is a conservation
success story. Students will learn about DDT in the food chain and analyze eagle
population statistics during the years of its recovery. New research, however, suggests
other chemicals in the environment may now be threatening eagles. Nye's work in New
York is presently measuring levels of such chemicals. In Washington, the effect of
human activities on wintering eagles is one of Watson's concerns. Thus, while conservation
challenges continue to confront eagles, past lessons have made scientists and citizens
more watchful.
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