Since the 1980's, there has been a continued effort to monitor the restoration of the midwest perigrine falcon.
On Wednesday, three falcon chicks living in a nest on top of the Indiana Michigan Power center downtown received their bands.
"By just putting colored leg bands on them, we can learn a lot about their history and behavior, their movements and survival. Who they pair up with, who they have a fling with..."
These three falcon chicks, named Ranger, Glenn, and Phoebe, are now tagged. At about six weeks old, they'll start to fly.
"They'll be testing their wings, flapping their wings, build up wing strength. And then one day they'll take a leap of faith, and jump off a 400 foot building. Certainly, a leap of faith."
Since 2013, I and M has had a falcon nest on top of their building every single year.
"I and M was very happy to cooperate. DNR was looking for tall buildings where they could nest, and I and M was very happy to cooperate."
John Castrale says these falcons are very territorial, and that's one of the leading causes of their death rates.
"Nest sites are limited. These tall structures are concentrated in large areas [like] downtown--power plants, that type of thing. And once they are occupied, these birds won't tolerate other peregrine falcons close to them.
If you would like to see the falcon chicks in action... I and M actually has a falcon camera on their website.