Biston sonomensis
Biston sonomensis is a of geometrid in the Geometridae. The species epithet refers to Sonoma County, California, indicating its association with this region. It belongs to a that includes several cryptically colored bark- and twig-mimicking moths.

Pronunciation
How to pronounce Biston sonomensis: /ˈbɪstən ˌsɒnəˈmɛnsɪs/
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Images
Distribution
Known from Sonoma County, California, based on the epithet and type locality.