Conservation Status
This species is classified as Least Concern (LC) on the IUCN Red List of Threatened Species (v3.1, 2001). Species are listed as such due to their wide distribution, presumed large population, or because it is unlikely to be declining fast enough to qualify for listing in a more threatened category. The population trend is stable. Year assessed: 2007.
However, it is listed as endangered in the state of Iowa, and threatened in Illinois and South Dakota. It should also be noted that in a number of states where it is native, such as Illinois and Missouri, it is illegal to own or breed any of the three subspecies without a permit. It is more common in the southern end of its range, where it holds no particular conservation status.
Read more about this topic: Heterodon Nasicus
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