SALT LAKE CITY - The owner of a Kolob Mountain cabin discovered over the Memorial Day weekend that it had been invaded twice - once by human burglars and again by endangered feathered scavengers.

Washington County, Utah, sheriff's deputies said thieves forced open the back door of the cabin and stole several items sometime during the past month.

The greatest damage, though, came later, when a family of California condors raided the home, destroying furniture and personal items throughout the residence. A damage estimate was not immediately available.

The vandals left behind feathers and droppings, which, along with witnesses who saw the birds, helped authorities identify the species.

The California condor, Gymnogyps californianus, is the largest bird in North America, with a wingspan of 9 1/2 feet. A member of the New World vulture family, the bird weighs from 17 to 25 pounds and is 45 inches to 55 inches tall when standing, according to the U.S. Fish and Wildlife Service.

The agency lists the bird as a federally protected endangered species and, as part of recovery efforts, has transplanted many of the birds from California to cliffs near the Arizona-Utah line.