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A never-before-seen picture of eagle migrations

In 1899, scientists began tracking avian migration by placing a small ring with an identifier around birds' ankles. Researchers then had to recapture the birds elsewhere, leaving the journey between those points a mystery. Today, GPS tags allow researchers to see every stage of bird migration. The tags are small, have long-lasting batteries and solar panels, and track dozens of metrics. Migration is no longer described as just a theoretical range but rather as an exact map. Despite this technological advancement, the routes of many species in their respective flyways remain undescribed.

In 1899, scientists began tracking avian migration by placing a small ring with an identifier around birds' ankles. Researchers then had to recapture the birds elsewhere, leaving the journey between those points a mystery. Today, GPS tags allow researchers to see every stage of bird migration. The tags are small, have long-lasting batteries and solar panels, and track dozens of metrics. Migration is no longer described as just a theoretical range but rather as an exact map. Despite this technological advancement, the routes of many species in their respective flyways remain undescribed.
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