By Brad Lambert, CNHP Zoologist
Since 1999, CNHP, in partnership with the Colorado Division of Wildlife, has been monitoring known breeding sites of the state endangered boreal toad (Bufo boreas) and surveying locations throughout Colorado for new populations. Data collected helps the Boreal Toad Recovery Team assess the status of the boreal toad in Colorado, and the U.S. Fish and Wildlife Service evaluate its status for potential federal listing as an endangered species.
In 2008, CNHP monitored 26 known breeding sites in Chaffee, Eagle, and Summit Counties, making repeated visits to collect baseline information on toad numbers and breeding success. In addition, 91 sites throughout Colorado were surveyed for boreal toads, resulting in the documentation of two new breeding sites in Chaffee County. Over 1,500 adult toads were tagged between 1999 and 2008.
An ongoing mark-recapture study investigating demographic variables in a large metapopulation of boreal toads continues this year in Chaffee County.