Many accounts are incomplete although new information is being added continuously.
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Users are cautioned to refer back to the original cited source to assess completeness and correctness before using the information. Web updates are intermittent, not continuous, therefore some dynamic information such as legal status may not be absolutely current. Not Specified Important Pogonomyrmex spp. 19 Comment 999 Comments on Population Status Primary threats to the Regal horned lizard come from changes in land use patterns within the species very limited habitat that could cause habitat alteration or destruction, including through uncontrolled wildlife or increased livestock grazing. Checklist of vertebrates of the United States, the U.S. Territories and Canada.