The Coronado expedition to the SW USA (1540-1542) reported losing a member to the bite of a Tarascan Amphisbaena, the only known member of the amphisbaena genus where the tail, not the head, is venomous. Hunted relentlessly in the 18th and 19th centuries (their striking neck plumage then being popular for ladies' hats), they are sadly thought to be extinct today and shouldn't be a worry for cycle tourists/bikepackers ground camping. The Mexico City Museo Nacional de Antropologia has an extraordinary amphisbaena shed skin on display almost one meter in length.