There were two sightings of Western yellow-billed cuckoos this year, both in Delta County, the U.S. Fish and Wildlife Service said. The secretive birds are listed as threatened under the Endangered Species Act, and the U.S. Fish and Wildlife Service is considering designating parts of western Colorado as critical habitat for the migratory bird, including lands along the Colorado River through Mesa County. Sightings — which frequently involve people hearing the cuckoo’s distinctive “klak-klak” sound — have been recorded in Mesa and Delta counties in previous years. ... “We have changed the initial map due to comments from the proposed...