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Sightings arranged by: Taxonomy Location Date Scientific Name
Hypsiglena cf. chlorophaea "Cochise" — undescribed species
The night snakes in this portion of Cochise county have been shown by DNA analysis to be a distinct clade that is being treated as a separate, not-yet-described species. They are sometimes referred to as "Hooded Nightsnakes" since at least most of them have a thick dark neckband with a size and shape as seen here. However, nightsnakes are quite variable in pattern, and this type of "hood" is sometimes seen on individuals from other areas, so it's not a completely solid diagnostic character.
- Daniel G. Mulcahy, 2006. Historical Biogeography of North American Nightsnakes and Their Relationships Among the Dipsadines: Evidence For Vicariance Associated With Miocene Formations of Northwestern Mexico
- Daniel G. Mulcahy, 2008. Phylogeography and species boundaries of the western North American Night snake (Hypsiglena torquata): Revisiting the subspecies concept
- Holycross, A. and Mitchell, J. 2020. Snakes of Arizona