A GPS map may therefore show a bird’s route changing dramatically without indicating that anything unusual or dangerous has happened.
The key is to interpret the data in the context of the eagle’s species, age, environment, and life stage.
Can a GPS-Tracked Eagle Really Be Studied for 20 Years?
A 20-year tracking story naturally raises an important question: Can a GPS device remain attached to a wild eagle for two decades?
In most cases, the answer requires careful qualification.
Tracking devices have limited power supplies, and their operational lifespans depend on battery capacity, solar charging, transmission frequency, weather exposure, and the technology used. Equipment can also fail, become damaged, or stop transmitting for reasons unrelated to the animal’s survival.
A tracking project may last many years without using the same device continuously. Researchers can sometimes replace equipment, reconnect with an animal through identification bands, or combine new tracking records with earlier observations.
