''Celastrina humulus'', the hops azure, is a species of

blue Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when obs ...

in the family

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfl ...

. It is found in North America. The main host plant is wild hops. They can change their body temperature by behaviors like basking or sitting in shade.Puntenney, C. P., & Schorr, R. A. (2016). Patch occupancy and habitat of the hops azure (Celastrina humulus), a rare North American endemic butterfly: Insights for monitoring and conservation. Journal of Insect Conservation,20(2), 215-222. doi:10.1007/s10841-016-9855-0 The MONA or Hodges number for ''Celastrina humulus'' is 4363.3.

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