Bat Roost Counts are back!
Sat, Jun 14
|Duarte, Address Provided to Registrants
Spend the evening contributing to community science with the Natural History Museum and HFAC. Counting bats flying in and out of their roost is not only super cool to witness, it also provides important data to scientists to protect these urban bat friends.


Time & Location
Jun 14, 2025, 6:10 PM – 9:30 PM
Duarte, Address Provided to Registrants, Duarte, CA, USA
About the event
Join the bat roost counts on Saturday and contribute to new urban biodiversity research with the Natural History Museum of L.A. County and HFAC educators! Our students are in the Natural History Museum Commons exhibit featuring the Backyard Bats project! Read more here.
Your participation will help scientists understand urban bat populations, locations, how they react to human disturbances like noise and light pollution, and prepare conservationists to respond to the spreading threat of white nose syndrome in case it reaches Southern California.
You’ll be part of a team of community scientists doing field research, counting bats as they depart from urban bat roosts under freeway bridges and along the Los Angeles and San Gabriel Rivers. This information will help understand a little-studied part of bat research: bats in the city. Join the Bat Roost Counts and get a close-up look at nature in L.A.!
What happens at a Bat Roost Count? Find out here.
Date: Saturday June 14, 2025
Time: 6:15pm-9:30pm
Location: Duarte
🦇 Backyard Bats Project: Community Science Ticket Levels
Join the Bat Count. Help Fund Student Access to Outdoor Science Trips.
🎟️ Free Ticket
Community Roost Pass: Get full access to the community science bat count at no cost. No donation is required to participate! Thank you!
💸 Optional Donation Tickets
Your donation helps fund community science field trips for students who may not otherwise have the opportunity to participate. Every contribution expands access! Tax-deductible donations as we are a 501(c)(3). Thank you!
$10 – Yuma Myotis Supporter: Like the small but mighty Yuma Myotis, your gift helps provide essential supplies and support for student field experiences.
$25 – Pallid Bat Partner: The Pallid Bat roams far and wide...your donation helps students join guided trips to explore nature and science in the field.
$50 – California Leaf-Nosed Champion: Your generous support goes towards transportation, materials, and mentorship for students from underrepresented communities in science.
*Please only register if you are sure you will be able to attend (of course unless someone gets sick)
Register early as this event does sell out with the museum, and in our group.
Type: Adult can stay, or drop-off student
Everyone Attending Must be registered
Age Requirement: 10+
What to Bring: Sturdy, closed-toe shoes you don't mind getting wet, a warm jacket, insect repellent, a flashlight or headlamp, water and snacks.
*If you have trouble standing for long periods of time please bring or request a folding chair.
More information will be provided to you a few days before the event.
A training video must be watched at home before the event to help ensure accuracy of the data.
See you at the roost!!