Mount Diablo Butterfly Guide

Over 70 species of butterflies are known to live on Mount Diablo, which is almost 50 percent of all known species in the San Francisco Bay Area. When looking for butterflies, choose a sunny day with a temperature above 65 degrees Fahrenheit, generally between 10 a.m. and 3 p.m. Very few butterflies fly when it is cool, foggy, or rainy. Binoculars that can focus 10 feet or closer are very useful.

In keeping with the California State Parks mission statement, butterflies and their habitat are protected, and collecting of butterflies is strictly prohibited in Mount Diablo State Park.

The Mount Diablo Butterfly List PDF has been generously compiled by Mount Diablo butterfly experts and enthusiasts. It is updated as information becomes available. MDIA welcomes input on sightings or other information that you may wish to contribute. Please contact MDIA at info@mdia.org.

Acmon Blue

Acmon Blue

Michael Marchiano

Bramble Hairstreak

Bramble Hairstreak

Kevin Hinsta

California Sister

California Sister

Michael Marchiano

Common Hairstreak

Common Hairstreak

Michael Marchiano

Edith's Checkerspot

Edith's Checkerspot

Kevin Hinsta

Great Purple Hairstreak

Great Purple Hairstreak

Kevin Hinsta

Lorquin's Admiral

Lorquin's Admiral

Monarch

Monarch

Kevin Hinsta

Mustard White

Mustard White

Kevin Hinsta

Mylitta Crescent

Mylitta Crescent

Michael Marchiano

Northern Checkerspot

Northern Checkerspot

Michael Marchiano

Orange Sulfur

Orange Sulfur

Kevin Hinsta

Painted Lady

Painted Lady

Micheal Woodring

Pale Swallowtail

Pale Swallowtail

Michael Marchiano

Purplish Copper

Purplish Copper

Michael Marchiano

Rural Skipper

Rural Skipper

Kevin Hinsta

Two-tailed Swallowtail

Two-tailed Swallowtail

Micheal Woodring

Variable Checkerspot

Variable Checkerspot

Michael Marchiano

Western Tiger Swallowtail

Western Tiger Swallowtail

Kevin Hinsta

© 2020 by Mount Diablo Interpretive Association