Pressing flowers between pages…
Once common in the mountainous portion of Colorado, the boreal toad has experienced sharp declines in distribution and abundance throughout its range in the state during the past twenty years.Today it is classified as an endangered species in Colorado, where its current, reduced distribution is not well known.The U.S.D.I.Bureau of Land Management contracted the Colorado Natural Heritage Program to conduct field surveys during the summer of 2002 in selected mountain drainages near the town of Powderhorn, Colorado.A high-elevation marshy area and specified portions of five mountain streams in and near the northern Powderhorn Wilderness were surveyed for boreal toads during early June and again during mid-August.No evidence of boreal toad adults, larvae, or egg masses was found during 14 days of fieldwork.Habitat that appeared to be suitable for use by breeding boreal toads was found in locations throughout the study area, although most ponds and pools lacked specific habitat features that are present at most sites where boreal toads are known to breed in the southern Rocky Mountains.Boreal toads were probably not present on the study area during the summer of 2002.Few known predators of boreal toads were observed during field surveys.Brook trout, which probably do not prey heavily on boreal toads in Colorado, were abundant at all sites surveyed except Indian Creek, where no fish were observed.
Items connected by shared entities, co-authorship, citations, or semantic similarity.