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Milbert's Tortoiseshell

Sand Cr, Klamath Co, June 25


Aglais milberti

Size: Up to 2 inch wingspan

Key ID features:  Unmistakable. Above black with broad red and orange submarginal band across FW and HW, and HW with blue spots in black marginal band. Below two-toned with very dark inner half and brown striated outer half with darker margin.

Similar species: Above, unlike any other Oregon species.  Below, California Tortoiseshell less distinctly two-toned, outer band more variable and more gray than brown.

Host plant: Stinging Nettle (Urtica dioica).

Habitat: Wherever nettles grow, often in wet areas or along waterways. 

Range: Throughout Oregon.

Season: Potentially any time of year, but mostly January to October.

Abundance: Common. 


Conservation Status: Secure

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