Michigan bald eagle project: Researcher climbs into nests in the name of science

The project, which examines the levels of chemical contaminants in the birds’ bloodstreams, among other things, has helped generate one of the most comprehensive datasets of its kind in the world. It also has played a significant role in the near-total recovery of a species that was once on the brink of extinction, though the study is likely to come to an end this year.