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Sleeping Dogface - Zerene cesonia - male

Sleeping Dogface - Zerene cesonia - Male
Pena Blanca Canyon, Santa Cruz County, Arizona, USA
September 5, 2012
Can someone explain the difference between Southern and California?

I'm not sure if it's possible to be sure unless you can see
upper side. However, in se. Arizona it is going to be a 'Southern'.

If you look at the upper side, usually (exceptions exist, and I suspect they might hybridize or even entergrade), the 'California' has no dark border on the hind wing in the males, and females lack the "dogface" pattern on the front wing (the dark borders are nearly missing entirely). The 'California' is more likely to have pink coloring on the upper side. The "dogface" pattern on male 'California Dogfaces' usually has the eye closer to the black border, and often there is even a connection. In the 'Southern', the eye is usually well separated from the border (not always, just usually). The dark base of the upper front wings in Southern is usually better developed with a straighter back side of the "dog's head', where it also comes closer to the eye spot. Also, the 'California' is only found on the coastal side of California and Baja California.

I suppose there is a chance that a 'California Dogface' might stray eastward (It gets into the deserts of S. California some), but I'm not aware any ever being found east of California (I'm sure other people who actually maintain collecting records would know if they have). After all, the 'Southern Dogface' is a notorious wanderer, and the two are related.

Comparing lots of photos is helpful - Butterflies of America.

Moved from ID Request.

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