Contact: Eleanor Gaskarth
University of Exeter
Caption: The study found that, while dominants and subordinates had comparable levels of antioxidant protection before the breeding season, once the intensive six-month breeding period had passed, the hardest working dominant females were suffering from weakened antioxidant protection.
Credit: Dominic Cram
Usage Restrictions: Must credit Dominic Cram
Related news release: Burnt out birds suggest hard work could be bad for your health