Moose

The moose (Alces alces), known as the elk in Eurasia, is the largest and heaviest member of the deer family Cervidae — a massive, long-legged ungulate of the boreal and temperate forests of the Northern Hemisphere whose sheer physical scale and distinctive anatomy set it apart from all other deer. Adult bulls stand up to 2.1 meters at the shoulder and weigh 400 to 700 kilograms, with exceptional individuals reaching nearly 800 kilograms in Alaska and eastern Russia, where the species reaches its greatest size. The name 'moose' derives from the Algonquian word 'moos' or 'moosu', meaning 'one who strips bark from trees' — an accurate description of their browsing habits. The moose's anatomy is a suite of cold-climate and deep-snow adaptations: extremely long legs allow efficient travel through meter-deep snow and wading in lakes and rivers; large, splayed hooves distribute weight on soft substrates and serve as paddles during swimming; the distinctive elongated, pendulous muzzle and prehensile upper lip enable precise grasping of submerged aquatic vegetation. Both sexes possess a pendant of skin and hair hanging from the throat called the 'bell' or 'dewlap', the precise function of which remains debated. Males grow enormous palmate antlers annually — reaching up to 1.8 meters span and 36 kilograms — shed each winter and regrown the following spring under velvet.

The moose's body plan is extreme even within the deer family. The legs are disproportionately long — front legs alone measure over 1 meter — with large, cloven hooves that can spread wide for snow travel and swimming. The shoulder hump, more pronounced than in other deer, anchors massive neck musculature that supports the heavy head and antlers. The muzzle is bulbous and overhanging, with a large, flexible upper lip uniquely adapted for grasping aquatic plants and stripping leaves from branches. The ears are large and highly mobile, providing excellent directional hearing. The coat is coarse and hollow-shafted (providing insulation and buoyancy), ranging from dark brown in summer to grayer tones in winter. Males grow antlers annually: broad, flattened palmate structures with multiple tines radiating from the main palm, unlike the more branched 'beam and tine' antlers of other deer. Females are noticeably smaller than males.

Moose are predominantly solitary animals outside of the breeding season — a lifestyle unusual among deer, most of which are social. They occupy large home ranges (typically 10 to 100 square kilometers, depending on habitat quality) that they traverse seasonally following food availability. Summer is spent near water, feeding on aquatic vegetation and avoiding heat and insects; winter involves moving to denser forest for thermal shelter and browsing on woody twigs and bark. The autumn rut (September to October) is the primary period of social activity: bulls travel widely searching for receptive cows, announcing their presence with loud grunting calls audible over great distances, thrashing vegetation with their antlers, and wallowing in urine-soaked pits that spread olfactory signals. Rival bulls assess each other through parallel walks and antler displays before escalating to shoving matches; serious fights involving interlocking antlers and powerful shoving can result in injury. Cows with calves are among the most dangerous large animals in the boreal forest — they will aggressively charge perceived threats including bears, wolves, and humans.

Moose are obligate browsers — they feed primarily on the leaves, twigs, and bark of deciduous and mixed-wood trees and shrubs rather than grasses, and their long legs make ground-level grazing energetically inefficient. The most important summer foods are aquatic vegetation — pondweed (Potamogeton), water lilies (Nuphar), horsetail (Equisetum), and various submerged and emergent plants — which are rich in sodium, a mineral often limiting in terrestrial vegetation. Moose wade and dive to reach aquatic plants, spending hours per day in ponds and lakes during summer. Terrestrial browse includes willows (Salix spp.), alders (Alnus), birch (Betula), aspen (Populus), and maple, with preferences varying by region and season. In winter, when leaves are absent, moose subsist on woody browse — twigs and bark of available shrubs and trees — a diet poor in energy and protein that requires consumption of large volumes. An adult moose must consume 10 to 20 kilograms of dry matter daily to meet nutritional needs, spending most of its active time foraging. Bark stripping (consuming the inner bark of trees) supplements the diet in late winter when other browse is depleted or buried in snow.

Moose are seasonally polygynous — bulls attempt to mate with multiple cows during the autumn rut, with larger, more dominant bulls achieving the majority of matings. The rut peaks in late September to early October across most of the range. After mating, bulls and cows separate and resume solitary lives. Gestation lasts approximately 231 days, with calves born in late May to early June. First-time mothers typically produce a single calf; experienced cows in good nutritional condition frequently produce twins, and triplets are rare but documented. Newborn calves weigh 12 to 16 kilograms and are precocial — able to stand and follow their mother within hours of birth. Calves grow rapidly on rich milk and begin browsing within weeks, reaching 150 to 200 kilograms by the autumn of their first year. Calves remain with the mother through their first winter and are driven away when the cow is ready to give birth the following spring — a period of family association lasting approximately one year. Young bulls typically reach sexual maturity at 2 to 3 years but rarely achieve breeding success until they are large enough to compete effectively with established bulls, typically at 4 to 5 years. Females reach sexual maturity at 1.5 years and can breed in their second autumn if nutritional conditions are good.

Moose are a major hunting game species in North America and Scandinavia, providing significant recreational and subsistence value. Vehicle collisions involving moose are a serious traffic hazard — moose are difficult to detect at night, their legs place their body at windshield height, and collisions are frequently fatal to both vehicle occupants and animal.