Biologists with the Indiana Department of Natural Resources built a nesting box for peregrine falcons on top of the Indiana Michigan Power Center building in the early 1990s.
They also installed a webcam that streams live video of the birds over the Internet.
Recently, three peregrine falcon chicks were removed from the nest, banded and placed back in the nest. Banding the birds allows biologists to track and study their movement patterns.
Peregrine falcons often nest in tall city buildings like the Indiana Michigan Power Center building, which offers a cliff-like vantage point, few natural predators and access to water and food such as pigeons and starlings.