The cuckoo roller or courol ("Leptosomus discolor") is the only bird in the family Leptosomidae , which was previously often placed in the order Coraciiformes but is now placed in its own order Leptosomiformes. The cuckoo roller is at the root of a group that contains the Trogoniformes, Bucerotiformes, Piciformes, and Coraciiformes.