A “terribly mannered” young black bear broke through the window of this camper home near Lake Avery this week and made quite the mess in an effort to find food. Colorado Parks and Wildlife later trapped and euthanized the bear, according to homeowner Di Harber. Several bear sightings have been reported in the county, and bear activity is on the rise statewide. CPW reported more than 1,700 bear sightings through June, compared with fewer than…