About Metlapilcoatlus mexicanus (Duméril, Bibron & Duméril, 1854)
Adults of Metlapilcoatlus mexicanus have an average total length of 50–70 cm, which is equal to about 20–28 inches. Males reach a maximum total length of 86.7 cm, or 34+1⁄8 inches, while females reach a maximum total length of 97.9 cm, or 38+1⁄2 inches. This species has an extremely stout body. Its geographic range extends along the Atlantic drainage from the Mexican states of Tabasco and Chiapas in Mexico, south to the Canal Zone in Panama. It can also be found on both slopes of Costa Rica and Panama. It occurs at elevations between 40–1,600 m, or 130–5,250 ft. Its designated type locality is Cobán, Alta Verapaz, Guatemala, which was originally recorded as "Coban, capitale de la province de la Véra-Paz, (République de Guatemala, Amérique centrale)".
