Pearl Crescent (Phyciodes tharos)...
...on Ox-Eye Daisy (Leucanthemum vulgare).
The Pearl Crescent ranges from southeastern Alberta, Canada south through Montana, Wyoming, Colorado, New Mexico, Arizona, and southeastern California to Mexico; east to southern Ontario, Canada and all the eastern United States, with the biggest concentration in the Midwestern States during the summer months.
Habitat includes open areas such as pastures, road edges, vacant lots, fields, and open pine woods.
Adult butterflies nectar from a great variety of flowers including dogbane, swamp milkweed, shepherd's needle, asters, and winter cress.
The Pearl Crescent gets its name from a pearl colored crescent shape on the underside of its hind wing, which is usually outlined in black. This butterfly can be hard to identify because it resembles several other species and because the overall pattern on its wings can differ geographically and can change depending on the time of season. During the cooler part of the season this butterfly typically has more markings on the underside of the wings and is a darker orange. Males are best identified by the antennal knobs, which are usually all black.
ISO400, aperture f/11, exposure .001 seconds (1/750) focal length 300mm