Illinois Natural History Survey - University of Illinois

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So far you’ve chosen: Pit between eye and nostril on each side of head; most scales on underside of tail in a single row

Tail ending in rattle or horny button; tail tip not yellow

Tail not ending in rattle or horny button; tail tip yellow in juveniles



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Last updated Wednesday, 16-Sep-2009 14:07:41 CDT

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