A team in Arizona equipped bald eagles (Haliaeetus leucocephalus) with the monitors to study their migration patterns. Between 2017 and 2023, the researchers tracked 24 recently fledged bald eagles and two nonbreeding adults. While breeding Arizona bald eagles tend to stick close to their nesting territories for most of the year, the movement of nonbreeding eagles is more of a mystery. Map showing distribution of Bald Eagle movements for individuals originating in Arizona, USA, during their migration and nonbreeding seasons. “There are very few instances where bald eagles banded as nestlings in Arizona have been observed breeding outside of the state,” says Capello.