Chlosyne janais, the crimson patch or janais patch, is a common New World butterfly found from Colombia north through Central America and Mexico to southern Texas. Adults inhabit the periphery of lowland tropical to subtropical forests, fields, and along streams, where they feed on flower nectar. Reproduction is continuous in the tropics, whereas in temperate areas several broods are produced from July to November. The caterpillars are grey white to green with several transverse rows of fleshly black spines; they feed primarily on acanthus shrubs, upon which adult females lay their eggs.

From Wikipedia article at https://en.wikipedia.org/wiki/Chlosyne_janais, which is released under the Creative Commons Attribution-Share-Alike License 3.0.