The North American beavers have no natural predators in the area.

North American beavers, introduced during the 1940s, have proliferated and caused considerable damage to the island's forests.

North American Beavers also use the abundance of aspen in the forest to build dens.

North American beavers have 40 chromosomes, while European beavers have 48.

The Eurasian beaver has a triangular nasal opening, unlike those of the North American beavers, which are square.

In Tierra del Fuego, where North American beavers were released from a bankrupt fur farm, havoc ensued.

North American beavers once flourished in the area, but their numbers have dwindled in the past few years and have become more rare in the area.

(The North American beavers were imported to Finland in 1937, when it was not yet known that C. canadensis was a different species from the Eurasian beaver.)

North American beavers have shorter nasal bones than their European cousins, with the widest point being at the middle of the snout for the former, and in the tip for the latter.

The Chilean and Argentinian governments have a plan of eradicating the North American beavers in the Tierra del Fuego area at the southernmost tip of South America.

These include California sea lions, Grey Seals, Harbour Seals, North American Beavers, Hooded Mergansers, Bald Eagles, Common Ravens, Brown Pelicans, Grey Wolves and North American River Otters.

North American beavers tend to be slightly smaller, with smaller, more rounded heads, shorter, wider muzzles, thicker, longer and darker underfur, wider, more oval-shaped tails and have longer shin bones, allowing them a greater range of bipedal locomotion than the European species.

Tetraoninae), ducks (Anatidae), and other small birds, and small mammals regularly consume the buds, catkins, shoots, and leaves of G. geyeriana; and it is one of many Salix species used in the construction of beaver dams for North American beavers (Castor canadensis).