Excerpts from Jim Conrad's
Naturalist Newsletter

from the July 9, 2017 Newsletter issued from Rancho Regensis north of Valladolid, Yucatán, MÉXICO

Mexican Sailor, DYNAMINE POSTVERTA, in the Yucatan

Above you can feast your eyes on a commonly seen butterfly at the ranch nowadays. You can imagine how pretty the powdery blue shows up against the landscape's deep, shadowy greenness. In the picture, the butterfly is in a less-than-pastoral setting: On the aluminum frame of a seatless, backless chair sitting next to the hut. The butterfly is nearly as pretty in a side view, as seen below:

Mexican Sailor, DYNAMINE POSTVERTA, in the Yucatan

That's the Mexican Sailor, DYNAMINE POSTVERTA, an exceptionally wide-ranging and variable species distributed from the US's warmer areas south to South America's Amazon region.

With any species distributed over such a vast area it's typical for regional variations to show up. However, it's very unusual for a species to show such drastically different appearances as this one. A page at the ButterfliesofAmerica.Com website shows some of them.

In the next section we'll look at a species that was a challenge to identify because its species were so similar. Over the years the Mexican Sailor has posed a very different challenge because of its many color and pattern differences. You can imagine how many names it's been assigned by early lepidopterists not knowing of its variability.