Vulnerable birds deviating from migratory routes by up to 155 miles, which could affect breeding
A young greater spotted eagle. The birds have had an average of 55 hours added to the journey to their breeding grounds.A young greater spotted eagle. The birds have had an average of 55 hours added to the journey to their breeding grounds.GPS data has revealed that greater spotted eagles not only made large detours after the invasion began, but also curtailed pitstops to rest and refuel, or avoided making them altogether.
The researchers warned the situation could delay breeding, as the eagles could need longer to recuperate, and affect the survival chances of any young, as prey may be less available when the eggs hatch., Russell and colleagues reported how they analysed migration routes taken by 19 greater spotted eagles as they flew through Ukraine to breeding grounds in southern Belarus in March and April 2022 – just weeks after the Russian invasion of Ukraine began.
The team said the greatest deviations from a direct path occurred where military activity was higher. However, Russell said, the degree to which the eagles appeared to have been affected varied.
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