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Known sites for the following rare or difficult to find butterfly species are surveyed annually in Monterey County, and searches for new sites are ongoing. Navigate to any species for survey results, reports of new populations, and a display of population trends.
Spring White Pontia sisymbri
Great Blue Hairstreak Atlides halesus
Coastal Green Hairstreak Callophrys viridis
Thicket Hairstreak Callophrys spinetorum
Muir's Juniper Hairstreak Callophrys muiri
Moss' Elfin Callophrys mossii
Western Pine Elfin Callophrys eryphon
Dotted Blue Euphilotes enoptes
Arrowhead Blue Glaucopsyche piasus
Clemence's Blue Icaricia monticola
​Melissa Blue Plebejus melissa
Unsilvered Fritillary Speyeria adiaste
Edith's Checkerspot Euphrydryas editha
Oreas Comma Polygonia oreas
Common Sootywing Pholisora catullus
Funereal Duskywing Erynnis funeralis
Two-Banded Checkered-Skipper Pyrgus ruralis
Sachem Atalopedes campestris
Lindsey's Skipper Hesperia lindseyi
Harford's Sulphur
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