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  • Study: Head shape and genetics augment understanding of rattlesnake species

    A new analysis found that some subspecies of the western rattlesnake actually may be separate species. Mark Davis, a research scientist at the Illinois Natural History Survey, part of the Prairie Research Institute at the University of Illinois, collected data from nearly 3,000 western rattlesnakes for this study. 

    Photo by L. Brian Stauffer


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  • Editor’s notes:

    To reach Mark Davis, call 217-333-6960; email

    The paper, “Deconstructing a Species-Complex: Geometric Morphometric and Molecular Analyses Define Species in the Western Rattlesnake (Crotalus viridis)” is available from the News Bureau