Migratory cranes face significant mortality from power line collisions during migration — marking programs and line modifications substantially reduce this preventable welfare harm.
Power line collisions represent a high-welfare-impact, preventable mortality source for cranes and other large migratory birds. Birds that survive initial strikes often suffer severe wing injuries requiring rehabilitation or euthanasia; undetected survivors likely die later from injuries. The welfare calculus strongly favors prevention: power line marking is low-cost relative to the number of deaths prevented, and underground cabling near key migration staging areas eliminates risk for the most vulnerable corridors. Crane conservation programs in Europe and North America now incorporate power line modification as a standard component of population recovery plans, demonstrating that collaboration between utilities, government agencies, and conservation organizations delivers measurable welfare and conservation outcomes.