Barn swallows face increasing chick starvation risk as insect populations decline, with climate change and agricultural intensification reducing the aerial insect prey they depend on.
Barn swallow chicks that die from starvation suffer a prolonged welfare harm as parents are unable to provision them adequately. Adults covering enormous distances to find sparse prey are also under energy stress. The underlying driver is insect decline from pesticide use, habitat loss and climate change. Supporting insect-friendly farming and habitats has direct welfare benefits for swallows and countless other species.