Appearance: Below, light to dark gray with distinct band of white “arrowheads” pointing inward on the hindwing. Also shows white spike in basal area of hindwing disk. Above, blue with brown margins and fringes checkered black and white.
Size: Small; 1 1/8 to 1 3/8 inches
Habitat: Open woods, trails, meadows, streamsides, slopes, sagebrush flats with lupines
Season: March to July
Larval Foodplant: Lupine and milk vetch species in the pea family
Did You Know…
Some blues, including possibly Arrowhead Blues, have developed a symbiotic relationship with ants. The caterpillars secrete a sweet liquid (honeydew) which is utilized by the ants as food and in turn the ants protect the caterpillars from other insect predators.
Species Gallery (click to enlarge)