Celastrina humulus

{{Short description|Species of butterfly}}

{{speciesbox

| taxon = Celastrina humulus

| authority = Scott & D. Wright, 1998

}}

Celastrina humulus, the hops azure, is a species of blue in the family Lycaenidae.{{cite web|title=Celastrina humulus Species Information|url=https://bugguide.net/node/view/306052|website=BugGuide.net|access-date=2018-02-06}}{{cite web|title=Celastrina humulus Report|url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=777897|website=Integrated Taxonomic Information System|access-date=2018-02-06}}{{cite web|title=Celastrina humulus Overview|url=http://eol.org/pages/4048830/overview|website=Encyclopedia of Life|access-date=2018-02-06}}{{cite web|title=North American Moth Photographers Group, Celastrina humulus|url=http://mothphotographersgroup.msstate.edu/species.php?hodges=4363.3|access-date=2018-02-06}} 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 hops azure has a mutualistic relationship with ants, called myrmecophiles.{{Cite journal |last=Schorr |first=R. A. |last2=Maison |first2=R. M. |last3=Puntenney |first3=C. P. |date=2020-12-01 |title=Multi-year occupancy of the hops blue butterfly (Celastrina humulus): habitat patch colonization and extinction |url=https://link.springer.com/article/10.1007/s10841-020-00264-w |journal=Journal of Insect Conservation |language=en |volume=24 |issue=6 |pages=927–934 |doi=10.1007/s10841-020-00264-w |issn=1572-9753 |access-date=2025-03-20|url-access=subscription }}

The MONA or Hodges number for Celastrina humulus is 4363.3.{{cite web

| author = Pelham J.P.

| title = A Catalog of the Butterflies of the United States and Canada, rev. 2017

| url = http://butterfliesofamerica.com/US-Can-Cat.htm}}