Hey there, I haven't been posting for a while due to a busy summer, but I think I'm one of the few here in Chicagoland that is actually active on the forums. Good to see someone else here from the area.
As far as species go, unfortunately, I've had to drive a half hour south to get anything of interest. Im near Orland Park, and we don't really have much around here by way of clear streams. Lots of the Cook county ponds have blackstripe topminnows, which are really cool, but the nice cyprinids are difficult to come by. The Des Plaines is filled with Gobies. I haven't come across any streams with large amounts of any darters besides Johnnys. Hickory Creek in New Lenox is clear and cold, and has good populations of Stonerollers, but I didn't see much else in there. For Darters I go all the way out to the Fox in Sandwich, its the only place I've found that has reliable populations of multiple species (I'm sworn to secrecy about my spot).
FishMap2 has only two spots in the area listed as holding Southern Redbelly Dace, and they're out near Manhattan which is a good ways out, and the two creeks amount to nothing more than drainage ditches, so I don't know how reliable they are, I've never been to either. The catch reports only had one specimen at one location and 17 at the other. I accidentally went to the wrong creek out that way looking for them, managed to find a longear sunfish, which I've never caught before in this area.
The fish are around, but you've got to be willing to travel a bit to get to the interesting ones. When I first started, it was hard finding more than a couple species, and I just took anything I could get my hands on. I found it better to be patient and pick times to drive to good locations rather than sticking with what was immediately local.
120 low tech native planted - Blackstriped Topminnow, Central Stoneroller, Fathead minnow, Golden Shiner, Black chin shiner, Carmine Shiner, Emerald Shiner, Sand Shiner, Spotfin Shiner, Orangethroat darter, Johnny Darter, and Banded Darter.