Celastrina Humulus
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Celastrina Humulus
''Celastrina humulus'', the hops azure, is a species of blue in the family Lycaenidae. 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 List of moths of North America, 4363.3. References Further reading

* Celastrina, humulus Butterflies described in 1998 {{Polyommatini-stub ...
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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 observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the ...
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