As an initial step, search the U.S. Fish & Wildlife Service website. It provides a Species Report that lists all endangered (E) and threatened (T) species by state, including both plants and animals. See the Resources section for a link to the U.S. Fi

As an initial step, search the U.S. Fish & Wildlife Service website. It provides a Species Report that lists all endangered (E) and threatened (T) species by state, including both plants and animals. See the Resources section for a link to the U.S. Fish & Wildlife Service website, and see an example of the U.S. Fish & Wildlife Service Species Report for Colorado in the Documentation Toolkit.