description Southern Dogface Overview
The Southern Dogface, Zerene cesonia, is a sulphur butterfly in the family Pieridae. It occurs across parts of North America and South America. Its common name comes from a dark pattern on the forewing that can resemble the profile of a dog or poodle, contrasting with the species' yellow wing coloration. The name identifies both a recognizable pattern and a member of the sulphur group.
help Southern Dogface FAQ
What is the scientific name of the Southern Dogface butterfly?
The Southern Dogface is Zerene cesonia, a sulphur butterfly in the family Pieridae. Older references may use the name Colias cesonia, but Zerene cesonia is the current name used in many species accounts.
Why is Zerene cesonia called the Southern Dogface?
A dark pattern on the yellow forewing resembles the profile of a dog's head. The pointed forewing and black border make that pattern especially noticeable when the butterfly is flying.
What plants do Southern Dogface caterpillars use?
The larvae feed on plants in the pea family, including alfalfa, prairie clovers, indigo, soybeans, and other legumes. Adults also visit flowers such as alfalfa, coreopsis, and verbena.
How is the Southern Dogface different from the California Dogface?
The Southern Dogface is Zerene cesonia and ranges from South America into the southern United States, with occasional northern strays. The California Dogface is the separate species Zerene eurydice, which is native to California.
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