Gray fox
Urocyon cinereoargenteus
Description A tad bigger than a house cat, this omnivorous mammal is marked by its salt-and-pepper coat and distinctive black-tipped tail.
Habitat Forest preserves; also the Morton Arboretum in Lisle. You’re most likely to see them in the wild at dawn or dusk.
Notes While the red fox (Vulpes vulpes) can be found around the globe, the gray is unique to North America. But what makes it really cool is its tree-climbing ability, an escape mechanism that pissed off visiting English fox hunters during colonial times. Locally, the gray fox population may be increasing faster than the more commonly seen reds, which are easier prey for our coyotes, says Joel Brown, an evolutionary ecologist from University of Illinois at Chicago.
I LOVE POSSUMS!!!!
The nests you are seeing are not in Rosemont, they are off of 90 in Busse Woods near Arlington Heights, and they are mostly Great Blue Herons along with a few other species.
Bats aren't rodents.
This Place is a Zoo -- Big Brown Bat...Did your writer really think that bats are rodents? They are mammals and are closer related to humans genetically than they are to mice. I could see if there was a ha ha in the little write-up after it says flying rodents, but looks like he/she was serious. I think if Larry Heaney, who is quoted in the article, ever sees this he'll be pretty ashamed and upset to be associated with such a misconception.
I have often noticed a rookery of nests close to Rosemount, IL. Does anyone know if these are eagles or a type of heron?