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= Zerene Eurydice = Zerene Eurydice, also known as the California dogface butterfly, belongs to the family, Pieridae, and is closely related to the genus, Eurymus (Colias). The California dogface is defined to the state of California, and has been labeled as the state insect.

Description & Wing Color Variation
The California dogface butterfly, gained its name as a result of the coloring of the wings of the butterfly, especially in the males. The female typically has yellow wings, with two black dots or dashes on each forewing, while the male has black on the outer edges of the forewing, usually enclosing a yellow-orange color and two black dots. The wing span of Zerene Eurydice measures about 5-6 cm. The iridescent pigment found in the dorsal forewing of male Z. Eurydice butterflies is due to light reflecting chitin structures and has been associated with mating success.

Distribution and Habitat
The distribution of Z. Eurydice is limited to california, and Amorpha californica is exclusively used as host for their larvae. Adult Z. Eurydice are attracted to moist soil and feed on various species of nectaring flowers, including sunflowers and blue gilia. The California dogface can be found in the mountains of Southern California and in woodland and forest regions. Higher altitudes and cooler temperatures have been shown to lighten wing pattern, while warmer temperatures have been shown to increase pattern, explaining the increased variability amongst the Z. Eurydice collected based on location and climate change.