Issues and Campaigns

“The Pros and Cons of Invasive Species” Presentation by David Leatherman, September 3, 2019

The Conservation Committee meeting in September 2019 included a special presentation on “The Pros and Cons of Invasive Species” by David Leatherman, retired State entomologist and birder extraordinaire. If you’d like a copy of this presentation, please contact us.

Canada Geese Management In Denver

Here are some facts and information about the complex topic of managing Canada Geese in the Denver area:

  • It is our understanding that Denver Parks and Recreation is acting according to management plans that state and federal agencies have reviewed and approved—and that comply with the Migratory Bird Treaty Act.
  • Denver Audubon supports a balance between the needs of wildlife and public/environmental health. Generally, culling, hazing, and repellents are short-term solutions.

Read more…

“Getting Green Laws” –
Environmental Topics in the Colorado Legislature

Audubon of Greater Denver and Audubon Rockies teamed up for a great session on “Getting Green Laws” February 19, 2019. Check out Getting Green Laws Resource Page – your source for materials and handouts presented.

Lead Poisoning In Birds

The Bald Eagle, symbol of our country, California Condors and other birds that eat carrion are being poisoned with lead, even as you read this. Incredibly, human beings who consume game meat are susceptible to lead poisoning as well, though this is less well documented and less well known. Read more…

Chatfield Reallocation Project

Chatfield State Park hosts over 1.6 million visitors a year, with opportunities for a wide variety of recreational activities, including boating, fishing, camping, hot-air balloon rides, horseback rides, hiking, trail running, bird-watching, nature photography, bike riding, and scuba diving. It also provides a great diversity of wildlife habitats that support 375 species of birds, and has been designated an Important Bird Area by the National Audubon Society.

Colorado will lose cottonwood forests, wetlands, and free-flowing streams heavily used by recreationists and essential for wildlife, including the threatened Preble’s meadow jumping mouse. In return we get acres and acres of barren mud flats, for what the Corps determined to be “0” dependable yield – the amount of water the project could reliably provide.

Denver Audubon asserts that the Corps did not seriously consider a number of sound, reasonable alternatives that would do less environmental damage. On October 8, 2014, the Audubon Society of Greater Denver (Denver Audubon) filed a complaint in US District Court against the US Army Corps of Engineers. On December 15, 2017, the District Court ruled in favor of the US Army Corps of Engineers’ decision to proceed with the Chatfield Reallocation Project.

On November 5, 2018, the 10th Circuit Appeals Court affirmed the District Court’s decisions. Denver Audubon lost the appeal.

Thank you so much for your interest and efforts,

Polly Reetz
Audubon Society of Greater Denver

Additional information is available at

For more information, contact:

Polly Reetz, Conservation Chairman, or Ann Bonnell, Board Member, at

Arctic National Wildlife Refuge
Colorado and the Arctic Are Connected

Colorado’s skies and waters are often filled with bird species that breed in the Arctic. These species provide a direct and living connection between our state and the Arctic, including Alaska’s Arctic National Wildlife Refuge.

The Arctic Refuge contains some of the most abundant and diverse wildlife across the entire Arctic, and the coastal plain is its biological heart. The 1.5 million acre region hosts nearly 200 species of birds. Some of these species pass through Colorado migrating to or from the Arctic, while others spend the entire non-breeding season in our state.



Bird/Window Collisions

Learn more about this threat to bird populations and how you can help protect birds in your backyard and at your office.

Keep Cats Indoors

The life and times of an outdoor cat and its impact on bird life. Watch a video and read about what happens when cats are allowed to run free or become feral.

Climate Change and Birds

Of the 588 North American bird species Audubon studied, more than half are likely to be in trouble. Learn more about what you can do to help birds in your neighborhood.