Sylvan

Hairstreak

Satyrium californica

Size: 1.0 - 1.25 inches wingspan

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Key ID features:  Warm, toasty brown above. Below, lighter gray-brown with median pale black spot band. On HW below, dash or checkmark spot next to blue patch below tail. HW and FW below with vague submarginal band of black lines, two or three of which are edged outwardly with orange near tail. 

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Similar species: California HS is generally more boldly marked, has black V-shaped spot next to the blue patch (not checkmark or dash), and has orange halos on black crescent along most of the outer marge below.

Host plant: Willows (Salix sp.).

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Habitat: Meadows, willow stands, and canyon slopes near water.​

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Range: East slope of Cascades, most of SE and SW Oregon except Gilliam, Morrow and Umatilla counties and Wallowa Mtns.

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Season: Early May to mid-September

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Abundance: Common

Conservation Status: Secure