NWA Space and Science supports IRWP as Bats and Bluegrass returns July 19th to IRWP’s Watershed Sanctuary in Cave Springs. This year marks 20 years of conservation for the Illinois River Watershed Partnership, and we’re celebrating with live music from Sons of Otis Malone and Bouse, hands-on watershed education, nature hikes, scavenger hunts, nature journaling, and the seasonal emergence of Gray Bats from the Sanctuary's cave.