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Northern Prairie Wildlife Research Center

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Caterpillars of Pacific Northwest
Forests and Woodlands

Photo Key to Species


Group B-1b -- Subgroups: Body wall smooth, except monarch butterfly - Species in group B-1a have a smooth body wall that is not extended into bumps, warts, tubercles, or horns. As an exception note the caterpillar of the monarch butterfly has four long filamentous tubercles.

Wavy longitudinal lines


Previous Section -- Straight longitudinal lines
Return to Photo Key to Species in Group B-1b
Next Section -- Irregular middorsal markings

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