After 40 years of tracking his birds, George Divoky’s 'lonely vigil' reveals a changing world.

George Divoky started tracking black guillemots on Cooper Island in 1972 after finding 10 breeding pairs nesting under old Navy debris. He lived in a lone cabin and worked alone for many years. By 1989, the colony grew to 200 breeding pairs, creating one of the longest records of Arctic birds.