Jasper-ridge
Guides
Euphydryas chalcedona colon
Variable Checkerspot (colon subspecies)
Euphydryas chalcedona colon is a subspecies of the variable checkerspot butterfly, a member of the brush-footed butterfly family Nymphalidae. Population studies at Jasper Ridge, California have revealed that colonies of this subspecies consist of two independently varying major demographic units, representing a portion of a larger deme rather than isolated populations. This structure differs from its congener Euphydryas editha, which occurs as partially connected demes.