With the completion of Glen Canyon Dam in 1963 there had never been a formal biological survey made along the Colorado River, and in the 1970’s, the National Parks System needed to know what resources it was managing. Come hear Herpetologist/Mammologist Dennis Tomko speak on what he found in terms of human impact and what was recommended for the management of the Grand Canyon’s deep riparian corridor. Sponsored by Northern AZ Audubon Society. Join us on Facebook Live or click on our Zoom link there. Tuesday Nov. 23, 7:00 pm. https://www.facebook.com/NAZAudubon