Average lifespan in the wild: 15 to 20 years

Size: Height at shoulder, 5 to 6.5 ft (1.5 to 2 m)

Weight: 1,800 lbs (820 kg)

Moose are the largest of all the deer species. Males are immediately recognizable by their huge antlers, which can spread 6 feet (1.8 meters) from end to end. Moose have long faces and muzzles that dangle over their chins. A flap of skin known as a bell sways beneath each moose's throat.

Moose are so tall that they prefer to browse higher grasses and shrubs because lowering their heads to ground level can be difficult. In winter they eat shrubs and pinecones, but they also scrape snow with their large hooves to clear areas for browsing on mosses and lichens. These hooves also act as snowshoes to support the heavy animals in soft snow and, in other seasons, in muddy or marshy ground.

In summer, food is far more plentiful in the northern regions of North America, Europe, and Asia. When the ice melts, moose are often seen in lakes, rivers, or wetlands, feeding on aquatic plants both at and below the surface. Moose are at home in the water and, despite their staggering bulk, are good swimmers. They can paddle several miles and dive as deep as 18 feet (5.5 meters), staying under for up to 30 seconds at a time.

Moose are similarly nimble on land. They can run up to 35 miles (56 kilometers) an hour over short distances, and trot steadily at 20 miles (32 kilometers) an hour.

Males, called bulls, bellow loudly to attract mates each September and October. The usually solitary bulls may come together at this time to battle with their antlers for mating supremacy. After mating, the two sexes go their separate ways until the following year. Though they may occasionally feed in the same grounds, they tend to ignore each other.

Females give birth to one or two calves in the spring—each weighing some 30 pounds (14 kilograms). These calves grow quickly and can outrun a person by the time they are just five days old. Young moose stay with their mothers until the following mating season.