The Black-billed Cuckoo is an uncommon breeder in the region and was recently added as a Threatened species in Illinois. They are usually found in shrublands, grassland hedgerows, or woodlands with moderate understory. This species can be very difficult to detect and BCN eBird records are insufficient to determine a significant trend. BBS data indicates a a significant annual decrease of -2.9% in the upper Midwest. Photo: © Eric Secker