Karl Overman: Birds and More


This butterfly was found at a large ranch in northern Sonora probably within 50 miles of the U.S. border.  The genus Junonia is found around the world with most species in the Old World tropics.  In North America the “Buckeye” species seem to have a long history of interbreeding so what is a species and what is not is still up for grabs. For example take note of this erudite view on the subject:

The high interfertilities, normal sex ratios, and lack of increased mortality or life-history disruptions in crosses among them indicate a high degree of geneticsimilarity within North and Central American members of Junonia.  Evidently the wing-color pattern differences that are obvious to taxonomists do not coincide with major reorganizations of the genome, but rather are the result of allelic differences at relatively few loci.

John Hafernik, Jr. Phenetics and Ecology of Hybridization in Buckeye Butterflies p.6  (1982)


‘Dark’ Tropical Buckeye (Junonia evarete nigrosuffusa)

Modified June 1, 2018