They are in there, just not in big visible numbers yet.
If you see a bighead or silver anywhere up past Starved Rock, try whatever you can to bring them in.Our friends at the federal level are looking for sample fish to test. Put them on a stringer or rope to insure they don't escape, and get them on ice ASAP. With recent cuts in manpower and funding, any help we can offer will be greatly appreciated.

Let me know if you guys get any. Also, record the exact location, weather conditions (air temp, wind, sun), water temp, and get a water sample if possible. Very few have been caught this far upstream, and the biologists want to learn how Asians on the edge of the current population area may differ in subtle ways from those in areas where they have well established populations.