The UCLA study has the potential to enhance scientists' understanding of the dangers faced by birds and their capacity for adaptation. It is widely understood that adverse weather conditions can disorient birds during their fall migrations, leading them to end up in unfamiliar territory. But why, e
Every year, millions of birds undertake incredible journeys, often covering thousands of miles, to reach their seasonal habitats. This annual migration is driven by changes in food availability, weather patterns, and the need to breed.
Earth’s magnetic field, which runs between the North and South Poles, is generated by several factors, both above and below the planet’s surface. Decades’ worth of lab research suggests that birds can sense magnetic fields using magnetoreceptors in their eyes. The new“There’s increasing evidence that birds can actually see geomagnetic fields,” said Morgan Tingley, the paper’s corresponding author and a UCLA associate professor of ecology and evolutionary biology.
Lead researcher Benjamin Tonelli, a UCLA doctoral student, worked with Tingley and postdoctoral researcher Casey Youngflesh to compare data from 2.2 million birds, representing 152, that had been captured and released between 1960 and 2019 — part of a United States Geological Survey tracking program — against historic records of geomagnetic disturbances and solar activity.
The researchers had expected that geomagnetic disturbances associated with heightened solar activity would be associated with the most vagrancy. To their surprise, solar activity actually reduced the incidence of vagrancy. One possible reason is that radiofrequency activity generated by the solar disturbances could make birds’ magnetoreceptors unusable, leaving birds to navigate by other cues instead.
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