|Status: Migrant.||Last recorded on site in 2021|
|2007-2011: Likely but not confirmed||2017-2021: Likely but not confirmed|
|This species is State Threatened. It is likely to be in
danger of extinction as a breeding species in the state of Illinois within the
|The Patuxent web-site provides more general information about this species.|
|At this time of year, this species is rare on site.|
This species is recorded fairly regularly during migration and more recently during the winter months. It is usually seen around the lakes on the eastern side of the site or roosting on the ledges of Wilson Hall. In April 1988, an immature male falcon from the 1987 Chicago Peregrine Release Project took up residence on the ledges of Wilson Hall. The 16 story building with its wide concrete ledges provided a very suitable resting and eating place. The falcon was observed at very close range from inside the windows. The bird was not seen at Fermi after the first week of May and was eventually found in the northern suburbs of Chicago suffering from a fatal internal infection.
On March 20, 2007 a pair established a territory at Wilson Hall. They were seen almost daily from then until mid June and the bands both birds carry enabled them to be identified. The male was a two year old and the female was a first year bird. Though no nest site was found and the female is considered too young to breed, they were clearly a mated pair, engaging in cooperative hunting and sharing food.
Photographer: Marek Proga.
The bands indicated that this is an adult male called "Joe". He was hatched on May 13, 2005 in Irving Park, Chicago, IL.