According to the Illinois Dept. of Natural Reourses : The Eurasian Collared Dove is native to India. They are considered an agricultural pest.
They are very similar to the Mourning Dove. Eurasian collared-doves are gray birds, slightly larger than mourning doves, but with a rounded tail. A black and white "collar" is on the neck. The underside of the tail is white at the end and black at the base.
First confirmed in Florida in the late 1980's, they are now seen in 48 states and provinces. Their population appears to double every 15 months. The collared dove doesn't seem to be aggresive toward native species, but there is concern about displacement of the native birds. "It is legal to harvest Eurasian collared doves during the dove season, and collared-doves count towards the 15-bird daily bag limit. "