The Caddo madtom (Noturus taylori) is a species of fish in the Ictaluridae family endemic to the United States. N. taylori was named in honor of William Ralph Taylor, U.S. National Museum, in recognition of his contributions to the knowledge of catfishes. They average 2 to 4 in long and weigh no more than few ounces. N. taylori species have small to tiny or fragmented ranges, but are mostly found in the Caddo, Ouachita, and Little Missouri Rivers in southwestern Arkansas. Ecological studies indicate that dam and bridge construction poses barriers to dispersal and migration of fish in the Ouachita Highlands. IUCNredlist.org states that better information is needed on life history, reproductive biology, and ecology of the Caddo madtom. This species is listed as vulnerable on the IUCN Redlist