The 2013 1oz Silver Canadian Wildlife Bullion Coin — Wood Bison is the sixth and final release in the Royal Canadian Mint's Canadian Wildlife bullion series. Struck in one troy ounce of .9999 fine silver, William Woodruff's reverse portrays the powerful wood bison, completing the limited wildlife sequence. The Royal Canadian Mint confirmed the sellout final issue in its 2013 annual report, giving this one-million-mintage completion coin additional collector significance.