I am seeing more and more butterflies every day here. This bright yellow butterfly is a Clouded or Common Sulphur (Colias philodice). Their flight is very fast and erratic, and they always perch with their wings folded. They can be seen in groups congregating at mud puddles. I see them most often here on the red annuals, including petunias and this impatien shown below. Their larval foodplants include Black Locust and clovers.
The orange Fritillaries are very common here as well, and are often on the butterfly bushes, gallardias and coneflowers. Click on either of these photos to view larger versions.
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Clouded Sulphur on red impatien
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orange Fritillary on butterfly bush
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I always learn something visiting you! Nice capture. you have a quick trigger finger.
Thank you, Quietpaths. :)