About The California Bat Working Group

Mission

The California Bat Working Group (CBWG) is composed of individuals dedicated to bat research, education, management, and conservation.

Our mission is to facilitate communication regarding bat ecology, distribution, and research techniques, and provide a forum to discuss conservation and management strategies, provide technical assistance, and encourage education.

How many bat species are found in California?

California is home to 26 species of bats, ranging from the smallest bat in the U.S., the canyon bat (Parastrellus hesperus), to the western mastiff bat (Eumops perotis), the largest bat species in the U.S.
How do I get experience or volunteer to help with bat field work?

Volunteers are welcome in many regions. Opportunities may include acoustic surveys, captures, roost counts, and educational outreach. The best way to get connected to the California bat community is through the Regional Bat Groups and the CBWG Email List. The PacWest bat hub also maintains a Forum for collaboration opportunities.
What is the California Bat Working Group?

The California Bat Working Group (CBWG) is a network of researchers, conservationists, land managers, educators, and citizens working to protect bat populations and habitats across California through science, education, and collaborative conservation efforts.
What is white-nose syndrome and is it in California?

White-nose syndrome is a deadly fungal disease affecting hibernating bats. As of 2024, the fungus that causes white-nose syndrome has been confirmed in five counties in California but bats with visible signs of the disease have yet to be observed in the state. You can find the most up-to-date information about the spread of white-nose syndrome on https://www.whitenosesyndrome.org/.
Do you have information about bat houses?

Bat houses can be a great way to provide roosting habitat, especially in urban or agricultural areas. Proper design, placement, and maintenance are key. Bat houses are not the only way to attract bats to your backyard. Check out Bat Conservation International's Guide to Gardening for Bats to get started.
What do I do if I find a bat or multiple bats?

If the bat is sick or dead, please report the bat using the CDFW reporting tool and follow the advice on the website. If the bat is alive, you can contact your local wildlife rehabilitator or local animal control for advice. If you find a colony of live bats, you can report them using the CDFW Report a Bat Colony tool and follow the advice on the website.