Butterflies of Humboldt Bay V 1.3

The Butterflies of Humboldt Bay is an interactive .pdf that allows users to scroll through individual species of butterfly that are commonly found in Humboldt Bay. Each species page includes:

  • Flight period
  • Larval food
  • Adult food

Photos for most species include views of the dorsal and ventral sides, unless the species habitually perches with its wings closed.

Maps that are located in this document depict iNaturalist observations as of spring 2024.

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Photo of a foggy morning in the Trinity River Valley.
The Arcata Fish and Wildlife Office is a field office of the U.S. Fish and Wildlife Service. Our work in northern California includes scientific assessments, habitat restoration, and conservation of listed species.
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A rocky shoreline of a river. The water is calm. Mist and green branches line the river.
The Ecological Services Program works to restore and protect healthy populations of fish, wildlife, and plants and the environments upon which they depend. Using the best available science, we work with federal, state, Tribal, local, and non-profit stakeholders, as well as private land owners, to...
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