Moose

The Moose (Alces alces) the largest and heaviest extant species in the deer family. Most adult male moose have antlers. Moose typically inhabit forests of the Northern Hemisphere in temperate to subarctic climates. Hunting and other human activities have caused a reduction in the size of the moose's range over time. It has been reintroduced to some of its former habitats. Currently, most moose occur in Canada, Alaska, New England, New York State, Fennoscandia, the Baltic states, Poland, Kazakhstan, and Russia. 
Its diet consists of both terrestrial and aquatic vegetation. Predators of moose include wolves, bears, and wolverines.
Diet
The moose is a herbivore and is capable of consuming many types of plant or fruit. The adult moose needs to consume 96 megajoules per day to maintain its body weight. Much of a moose's energy is derived from terrestrial vegetation, mainly consisting of forbs and other non-grasses, and fresh shoots from trees such as willow and birch. As these terrestrial plants are rather low in sodium, as much as half of their diet usually consists of aquatic plants, including lilies and pondweed
Predators
A full-grown moose has few enemies except Siberian tigers which prey on adult moose, but a pack of gray wolves can still pose a threat, especially to females with calves. Brown bears are also known to prey on moose of various sizes and are the only predator besides the wolf to attack moose both in Eurasia and North America. However, brown bears are more likely to take over a wolf kill or to take young moose than to hunt adult moose on their own. American black bears and cougars can be significant predators of moose calves in May and June and can, in rare instances, prey on adults (mainly cows rather than the larger bulls). Wolverines are most likely to eat moose as carrion but have killed moose. Orcas are the moose's only marine predator as they have been known to prey on moose swimming between islands out of North America's Northwest Coast, however, there is at least one recorded instance of a moose preyed upon by a Greenland shark.