As a result, many migrating raptors follow land corridors, coastlines and mountain systems and concentrate at geographical bottlenecks.
Research on several eagle species has documented narrow migration corridors created by geography, weather and soaring conditions. Springer Nature Link
So the complicated routes aren’t random.
They’re often the result of birds choosing routes that make long-distance flight more efficient and survivable.
How can a tiny tracker follow an eagle?
Modern wildlife tracking devices can be surprisingly small.
Many bird-tracking systems use solar-powered transmitters, allowing researchers to collect location data over extended periods without relying solely on a conventional battery.
Researchers have used these technologies to map migration routes covering thousands of kilometers and multiple continents. Collège de Science
But that doesn’t mean a single device was operating continuously on one eagle for 20 years.
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The viral claim
“Scientists tracked one eagle for 20 years.”
