Bordered Patch (Chlosyne lacinia) butterflies are dark brown with white and orange markings and a characteristic orange patch on the hindwings near the tip of the abdomen. Bordered Patch butterflies are quite variable, and it's not uncommon to see several of the different variants together. Some of these butterflies have a broad band of orange across the hindwings.
While other Bordered Patch butterflies instead have a row of white spots across the hindwings.
The forewings of Bordered Patch butterflies are also quite variable and can be marked with either white or orange spots or an orange band. A pale orange band can generally be seen on the ventral hindwings.
Adult Bordered Patch butterflies feed on flower nectar, and they are very attracted to mud. I spotted these ones "mud puddling" along a stream bank in the foothills of Arizona's Santa Rita Mountains in early September. Bordered Patch caterpillars feed on plants in the Aster Family (Asteraceae).