Denver Zoo releases more than 620 endangered boreal toads into their native range

More than 50 percent of frog, toad, salamander and other amphibian species are at risk of extinction within the next 50 to 100 years due to habitat loss, climate change, pollution and disease.
Published: 6:27 PM MDT June 28, 2019
Updated: 6:26 PM MDT June 28, 2019