Rancho Nuevo beach in Tamaulipas is the only nesting site in the world for the Kemp's Ridley sea turtle (Lepidochelys kempii) while other herpetofauna of the ecoregion include Río Grande Chirping Frog (Eleutherodactylus cystignathoides) and Mexican White-lipped Frog (Leptodactylus fragilis).