Researchers studying birds around the site of the 1986 Chernobyl nuclear power plant disaster found that the birds favored sites with lower background radioactivity.
The study was based on the behavior of Great Tits and Pied Flycatchers between 2002 and 2003. Researchers placed nestboxes in areas of varying radioactivity; the birds preferred to nest in lower levels of radiation. Based on their choices, Pied Flycatchers did seem to be more sensitive to radiation.
