Migratory birds face extraordinary welfare challenges along their flyways, including collision with structures, light pollution, habitat loss, and hunting pressure at stopover sites.
The welfare of migratory birds must be understood along the entire flyway - from breeding grounds through stopover habitats to wintering areas. Each migration is a welfare gauntlet that tests birds' physical reserves, navigation, and adaptability. Building collision deaths are frequently traumatic - birds that survive initial impact suffer internal injuries, head trauma, and disorientation. Light pollution causes nights-long exhaustion as birds circle illuminated structures, depleting the fat reserves they have spent weeks accumulating. Hunting pressure at traditional stopover sites in countries where songbird trapping is culturally practiced causes direct mortality at nodes where birds are most energetically vulnerable. The cumulative welfare impact across multiple stressors is enormous.