Sumatran orangutan crosses canopy bridge in Indonesia for first time. Five bridges built in 2024 in North Sumatra to help animals bypass road. Bridges help 350 orangutans reconnect in Pakpak Bharat district. NGO calls event 'world first' for Sumatran orangutans. Conservation milestone achieved as human development and wildlife coexist. Habitat fragmentation remains major conservation challenge. Sumatran orangutans classified as critically endangered by IUCN