Upcoming Events
2026 Colorado Birding Challenge
Join Colorado Field Ornithologists for the 2026 Colorado Birding Challenge. There are lots of ways to participate and see how many species you can find in 24 hours!
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Bullock’s Oriole by Kevin Smith.
Teen Naturalists: How Weather Affects Bird Migration in the Front Range
Come learn a bit about Front Range weather, why we get bird rarities associated with some storm sytems, and how to maximize your chances of seeing cool birds.
Speaking Eep! A Film About the American Pika
NOTE: This free program will be offered in-person only. No registration required, just come join us!
Doors open at 6:30 for social time with light refreshments.
Before the film, we will present a Lifetime Achievement Award to Ruth Carol and Glenn Cushman, to honor their decades of contributions to Boulder County through nature writing and more!
Then Ethan Cleveland will give a short talk about his recent experience at National Audubon Society’s Coastal Maine Bird Studies for Teens Program at Hog Island
Finally, our main program for the evening - Speaking Eep! follows Dr. Chris Ray and PhD candidate Rachel Billings as they work to decode the iconic “eeps” of pika language and discover how these beloved animals might adapt to an increasingly fragile environment.
Photo of American pika with food, from the film Speaking Eep! Directed by Jim and JinYoung Jayson, Just Float Films, 2026
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Barn Swallow by Gerhard Assenbacher.
Teen Naturalists: A Glimpse at a Unique Boulder Habitat - White Rocks Nature Preserve
Join for rare access to White Rocks Nature Preserve that hosts rare plants and a rare lizard that are found nowhere else in Boulder County, fossils, and creek scenery that will be at the height of fall color change.
CU Boulder Masters of the Environment Student Showcase
NOTE: This free program will be offered in-person and on Zoom.
IN PERSON: Doors open at 6:30 for social time with light refreshments.
Join us for our first ever CU Boulder student showcase! Students from the Masters of the Environment program will present their capstone projects. Each student group is partnering with a local natural resource nonprofit or land management agency for their project.
Photo Credit: Elk crossing highway 36 north of Boulder, by Susan Spaulding, Boulder County Parks and Open Space.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Belted Kingfisher by Kevin Smith.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Male (left) and female (right) Hooded Mergansers by Kevin Smith.
Heartbreak and Hope: A Biologist’s Life with Condors
Learn about California Condor biology, history, and innovative management techniques with condor biologist Erro Lenhert.
This special program will be offered in-person only and is a Ticketed Event! See full description for details.
Photo of California Condor by Erin Lenhert.
Fall 2026 Speaker Series Preview
Preview the speakers for the fall 2026 programs season.
NOTE: Our programs for the foreseeable future will be held at our usual location, the Unitarian Universalist Church of Boulder on Pennsylvania Avenue. The church’s construction has been delayed.
Starting in 2020, many programs were recorded and are available to view on the BCAS YouTube channel. The channel includes playlists for each fall/spring program series.
EVENT CANCELED. Teen Naturalists Season Kick Off: World of Moths with Pizza Party
THIS EVENT HAS BEEN CANCELED. Join the Boulder County Audubon Teen Naturalists to kick off the 2026-27 season with a pizza party and an opportunity to meet Colorado’s moths up close and personal.
Golden Ponds Nature Area with Carl Starace
Golden Ponds Nature Area parking lot
2505 3rd Avenue, Longmont, CO (map)
Observe spring birds at Golden Ponds Nature Area in Longmont with local bird watcher Carl Starace.
Photo credit: Juvenile Cooper’s Hawk by Alan Vernon CC 2.0 via Wikimedia.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Spotted Sandpiper by Gerhard Assenmacher.
Old St. Vrain Road with Carl Starace
Observe summer birds along Old St. Vrain Road with local birder Carl Starace.
Photo credit: Western Flycatcher by Kevin Smith.
Boulder Birds and Brew Tenth Anniversary Celebration at Wild Provisions
Join BCAS to celebrate TEN years of Boulder Birds and Brew, with bird games, snacks and brews at Wild Provisions
Photo credit: Mountain Bluebird, by Kevin Smith.
Sandstone Ranch - Longmont
Sandstone Ranch Community Park and Nature Area, Sandstone Drive, Longmont.
Observe birds at Sandstone Ranch with local birder Carl Starace.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Black-capped Chickadee by Kevin Smith.
Sonata for Moon, Stars & Fireflies
Sawhill Ponds Trailhead (map)
Enjoy the rising full moon and accompanying classical music, plus twinkling stars and hopefully fireflies, with community naturalist Dave Sutherland.
Photo of full moon by Dave Sutherland.
Ron Stewart Preserve at Rabbit Mountain with Carl Starace
Observe resident and migrant birds at Rabbit Mountain with local bird watcher Carl Starace.
Photo credit: Yellow-Breasted Chat by Ken Cook.
Destination: Ice Age
Realization Point parking lot, Flagstaff Road (map)
Visit one of the last remnants of the Ice Age forest in Colorado with community naturalist Dave Sutherland.
Photo by Dave Sutherland.
Heil Valley Ranch with Carl Starace
Observe birds in the foothills at Heil Valley Ranch with local birder Carl Starace.
Photo credit: Western Tanager by Kevin Smith.
Jewels of the Night Sky: Solstice Telescope Party
Peer into the heart of our galaxy, the Milky Way, to see new stars like the Sun being born and much more with community naturalist Dave Sutherland.
NOTE: The program will be offered once on June 11, 12, or 13, on the night with the best weather forecast.
Image of Whirlpool Galaxy by Dave Sutherland..
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Northern Flicker by Kevin Smith.
Teen Naturalists: Bird Songs of the Jungle
Each spring, tropical migrants return to Boulder to nest. Join bird song expert Nathan Pieplow and naturalist Dave Sutherland at one of our best birding "hot spots" for an exploration of bird songs and calls.
Old St. Vrain Road with Carl Starace
Picture Rock Trailhead, Heil Valley Ranch, Red Gulch Road, Lyons, CO (map)
Observe early summer birds along Old St. Vrain Road with local birder Carl Starace.
Photo credit: Black-headed Grosbeak by Kevin Smith.
Intro to Butterfly ID for Birdwatchers
People of all ages are captivated by butterflies. Learn some basics of butterfly ID and ecology, accompanied by Wynne Whyman’s gorgeous photos.
Photo of Western Tiger Swallowtail by Wynne Whymann.
This program will be offered in person and on Zoom.
IN PERSON: Doors open at 6:30 for social time with light refreshments.
Boulder Birds & Brew: Bear Canyon Trail/ Southern Sun
Note: This trip is full, but you can join the waitlist.
Look for colorful returning spring migrants in Boulder’s foothills with Jim Fisher.
Photo credit: Broad-tailed Hummingbird by Kevin Smith.
World Migratory Bird Day of the Rockies 2026
Walden Ponds Wildlife Habitat (map)
World Migratory Bird Day is a celebration of migratory birds and their incredible journeys! Enjoy guided bird walks, education stations, live birds of prey and more in this multi-day celebration of spring bird migration.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Ring-necked Duck by Kevin Smith.
Teen Naturalists: Understanding Habitats and Nature Through Art with Laura Steadman
This hands-on workshop invites participants to sharpen their observation skills through art while having creative fun.
Why Private Land Conservation Matters
Tony Caligiuri, President of Colorado Open Lands (COI), will introduce the audience to COI’s work to protect landscapes and our beloved wildlife on private lands across Colorado.
Photo of Sandhill Cranes in field, by Tony Caligiuri
This program will be offered in person and on Zoom.
IN PERSON: Doors open at 6:30 for social time with light refreshments.
Ron Stewart Preserve at Rabbit Mountain with Carl Starace
Observe resident birds and spring migrants at Rabbit Mountain with local bird watcher Carl Starace.
Photo credit: Tree Swallow by Gerhard Assenmacher.
Golden Ponds Nature Area with Carl Starace
Golden Ponds Nature Area parking lot
2505 3rd Avenue, Longmont, CO (map)
Observe spring birds at Golden Ponds Nature Area in Longmont with local bird watcher Carl Starace.
Photo credit: Osprey by Kevin Smith.
Lafayette Birds! First Sunday Bird Watching
Discover the fun of observing birds and other natural wonders with knowledgeable Lafayette bird watchers.
Photo credit: Green-winged Teal pair by Kevin Smith.
Boulder County Nature Association 2026 Ecosymposium- Public Lands in Public Hands for the Public Good: Engaging law, policy, and advocacy to protect our shared natural heritage.
This image— a grandmother teaching her grandson to fish—highlights just a few of the many benefits offered by public lands and waters: opportunities to have fun, gather food, teach and learn, share time with family, relax and reflect in nature. Boulder County Nature Association’s 2026 ecosymposium will strengthen participants’ understanding of current issues in policy, law and management of our public lands, learn about efforts to protect what we have, and build our courage and our toolkits for effective public lands advocacy, amid unprecedented pressure on public lands.
Photo credit: https://creativecommons.org/licenses/by-nc/2.0/deed.en and https://www.flickr.com/photos/kkanouse/16522642271/in/pool-familyvacations/
Eagles! Their Lives, Symbolism and Cultural Significance. Featuring live eagles!
Join naturalist and educator Martin Ogle to learn about the cultural significance and symbolism of golden and bald eagles, and life lessons they can teach us.
Image by Martin Ogle.
Teen Naturalists: Meet-n-Greet Flamingos at Denver Zoo Conservation Alliance
Meet-and-Greet with flamingos, behind-the-scenes at the Bird Propagation Center, and docent-led tour!
Pella Crossing with Carl Starace
Observe birds at Pella Crossing with local birder Carl Starace.
Photo credit: Common Goldeneye by Kevin Smith.
Falcons…Streamlined for Speed
Join wildlife photographer and conservation educator Perry Conway for a talk about the natural history and evolution of six North American falcon species, accompanied by stunning photos.
Photo of Aplomado Falcon by Perry Conway.
This program will be offered in person and on Zoom, but will not be recorded.
IN PERSON: Doors open at 6:30 for social time with light refreshments.