Corrugated fiberboard is sometimes called corrugated cardboard, although cardboard might be any heavy paper-pulp based board.
Gray Wolf. The gray or timber wolf's story is one of the most compelling tales of American wildlife. Once, the wolf was widespread across most of North America, but it was hunted ruthlessly and extirpated over most of its range. Today, the wolf is making a successful comeback in some of its former habitat due to strong conservation efforts.
Unfortunately, by the mid-1930s, the killing of wolves greatly reduced the Gray Wolf population in the United States to parts of Alaska, Idaho, Michigan, Minnesota, Montana, Wisconsin and Wyoming.Today, Minnesota has the largest wolf population of any U.S state!reeding: Gray Wolves breed once a year between January and April, depending on where they live; northern populations breed later in the season than southern populations. Female and male wolves reach sexual maturity between 2 and 3 years. A female goes into estrus once a year for 5 to 14 days.