Schemes including Heterodon nasicus

• IUCN Red List of Threatened Species. Version 2012.1 Heterodon nasicus
• The Reptile Database (Heterodon_nasicus) Heterodon nasicus
• IUCN Red List of Threatened Species. Version 2012.2 (63819) Heterodon nasicus
• Norma 059, 2010 Heterodon nasicus
• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.102597) Heterodon nasicus
• CONABIO (17678REPTIB501112) Heterodon nasicus
• GBIF (5223725) Heterodon nasicus