Celastrina ladon
| Spring azure | |
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| Male, Cougar Mountain Regional Wildland Park, Washington, United States | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Lycaenidae |
| Genus: | Celastrina |
| Species: | C. ladon |
| Binomial name | |
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Celastrina ladon (Cramer, 1780) |
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| Subspecies | |
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Celastrina ladon, the spring azure, is a butterfly of the Lycaenidae family. It is found in North America from Alaska and Canada south of the tundra, through most of the United States except the Texas coast, southern plain and peninsula Florida; south in the mountains to Colombia.
Since the publication of a monograph on the Lycaenopsis group of lycaenid genera in 1983 by Eliot & Kawazoe,C. ladon has been considered by some taxonomic authorities to be a subspecies of C. argiolus (Linnaeus, 1758). Other authorities still consider C. ladon and related species C. neglecta and C. serotina, to be "full" species.
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