Migratory bird conservation requires international cooperation across entire flyways as populations cross dozens of countries between breeding and wintering grounds.
Migratory birds traversing degraded flyways face welfare consequences at every stage - inadequate refueling sites leave birds with insufficient energy reserves, forcing riskier weather crossings and longer fasting periods. Population declines of 50-80% in Yellow Sea shorebirds represent the welfare consequences of losing critical stepping-stone habitat. Individual birds that fail to refuel adequately face starvation during crossings - a direct welfare harm multiplied across billions of annual migratory journeys.