Female mammals usually outlive males, but a 27-year study found the pattern was reversed among dozens of North American bird species
Female birds have shorter lifespans than male birds, researchers find Female mammals usually live longer than males, but a 27-year study of North American birds has found the opposite pattern in birds.Researchers at the University of California, Los Angeles (UCLA) analyzed more than 563,000 bird-banding records and found that adult female birds had a 12.4%…