The Western hooknose snake (Gyalopion canum) is a species of small colubrid snake native to the United States, from western Texas to southeastern Arizona, and into northern and central Mexico. It was once classified in the genus Ficimia, but was reclassified due to distinct morphological characteristics. It is sometimes referred to as the Chihuahuan hook-nosed snake because it is commonly found in the Chihuahuan Desert.