Female birds have shorter lifespans than male birds across 35 North American species, researchers find

Birds have a lot to do in their short lives: defend territories, build nests, raise chicks and feed themselves. But the toll of these activities may be greater for female birds than for male birds. A new study by UCLA ornithologists has found that female birds have lower survival rates than males.

Source: [Phys.org](https://phys.org/news/2026-07-female-birds-shorter-lifespans-male.html)