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Acmon Blue Butterfly

Icaricia acmon


The Acmon Blue (Plebejus acmon) is a North American butterfly. It ranges mainly in California but can be seen north to Oregon and south through Baja California. The tops of the wings are blue with dark edges in males and brown in females. Its underside is white with black spots for both sexes with a red-orange band on the hindwing. Adults feed on nectar while caterpillars can feed on buckwheats, lupines, trefoils, and milkvetches. Like many other Lycaenid butterflies, it has a mutualistic relationship with ants, who protect Acmon Blue larvae in exchange for honeydew that the larvae secrete.


Coastal scrub and grassland

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Marlyn 9 years ago

I love it !!!!

alicelongmartin 9 years ago


Maria dB
Maria dB 9 years ago

a beauty!

Leuba Ridgway
Leuba Ridgway 9 years ago

The butterfly is beautiful no doubt, but more importantly to me, your pictures are so natural and beautiful - although small, they've captured the Californian sun that I remember so well....

Gerardo Aizpuru
Gerardo Aizpuru 9 years ago

Well this is really a fantastic one love it:)

DonnaPomeroy 9 years ago

Thanks Gerardo. We don't have big flashy butterflies here in California, like they do in the tropics, but some of these little ones have subtle beauty.

Gerardo Aizpuru
Gerardo Aizpuru 9 years ago

Beautiful !

Spotted by

San Mateo, California, USA

Spotted on Jun 16, 2012
Submitted on Jun 16, 2012


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