The 25 milligram Prairie Dog Aurum® gold bill is a special, limited edition, adding to the existing five-bill North American Animal Aurum® series (which would complete the collection for a total of six bills). The bill showcases a Prairie Dog in Pawnee Butte, located in Northeast Colorado. Animal featured as a large profile on the right and a small reverse in the lower left.

The 50 milligram Bald Eagle Aurum® gold bill is the smallest gold bill in our five-bill North American Animal Aurum® series. The bill showcases the majestic North American Bald Eagle in its native landscape. Multiple levels of micro-printing and security elements have been embedded throughout the artwork.

The 100 milligram North American Gray Wolf Aurum® is the third-smallest bill in our Natural Treasure series. A modern take on classic themes, this bill showcases the far-roaming, resourceful wolf in its native landscape. Multiple levels of micro-printing and security elements have been embedded throughout the artwork.