Overview of swallow welfare during migration, breeding season, and sub-Saharan wintering.
Swallow welfare spans the entire migratory cycle from UK breeding to African wintering. UK breeding welfare depends on invertebrate-rich farmland habitat and appropriate nest sites in farm buildings. Sahel rainfall determines wintering ground quality and survival rates. Migration itself carries natural welfare costs from weather, predation, and energy demands. Conservation actions in UK farmland habitat and advocacy for Sahel ecosystem health both contribute to swallow welfare.