Schemes including Heterodon platirhinos

• IUCN Red List of Threatened Species. Version 2012.1 Heterodon platirhinos
• The Reptile Database (Heterodon_platirhinos) Heterodon platirhinos
• IUCN Red List of Threatened Species. Version 2012.2 (63820) Heterodon platirhinos
• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.106140) Heterodon platirhinos
• GBIF (5223730) Heterodon platirhinos