Lepus othusAlaskan hare
Geographic Range
Lepus othus is found in northern and western Alaska. Some descriptions also place them at the extreme eastern tip of Siberia.
Habitat
Lepus othus tend to live on rocky slopes or upland tundra. They dislike low places. They may also be found in brushy areas that are good for camouflage.
- Terrestrial Biomes
- tundra
Physical Description
Alaskan hares are the largest hare species in North America, measuring in length from 0.5 to 0.7 m with a tail length of about 8 cm, and very large hind feet (almost 20 cm long) which aid in movement over snow. There is no sexual dimorphism in size. Alaskan hares have robust skulls, strongly recurved upper incisors, and stout claws for digging in the snow. Unlike most hares, they have fairly short ears to conserve heat in the arctic environment. Lepus othus has a gray-brown topcoat with a white undercoat in the summer, but sheds and grows an entirely white coat in the winter, except for the black fur at the tip of the ears which is present year-round.
- Other Physical Features
- endothermic
- homoiothermic
- bilateral symmetry
- Sexual Dimorphism
- sexes alike
-
- Range mass
- 3.9 to 7.2 kg
- 8.59 to 15.86 lb
-
- Average mass
- 4.8 kg
- 10.57 lb
Reproduction
Lepus othus, in contrast to many other hares, has only one litter per year. This litter tends to be larger on average than other hare species. Litters consist of 4 to 8 (averaging 5) young called leverets. The mating season lasts from April to May and young are born in the summer months, from June to July. They have a somewhat darker pelage than adults. Like all hares, they are born with a full coat of fur and their eyes open. Leverets are fairly active soon after birth. This is useful because they do not live in burrows, but are born in open nest sites above ground.
- Key Reproductive Features
- gonochoric/gonochoristic/dioecious (sexes separate)
- sexual
-
- Range number of offspring
- 4 to 8
-
- Average number of offspring
- 5
- Parental Investment
- precocial
Behavior
Alaskan hares are mosly active at dusk and dawn, when they forage for food. They tend to be solitary except during the mating season, from April to May, when they congregate in groups of 20 or more.
- Key Behaviors
- terricolous
- saltatorial
- crepuscular
- motile
- sedentary
- solitary
Communication and Perception
Food Habits
Alaskan hares mainly eat woody vegetation, including willow leaves, shoots, bark, and roots. They also feed on grasses, berries, and flowers when they are available. Evenings are the most common time to feed.
- Plant Foods
- leaves
- roots and tubers
- wood, bark, or stems
- fruit
- flowers
Predation
Alaskan hares are not aggressive animals, they defend themselves mostly through hiding, aided by protective coloration. Still, they have been reported to defend themselves from attacking owls with their strong front legs. Raptors, weasels, wolverines, foxes, and polar bears are all potential predators of Alaskan hares.
- Anti-predator Adaptations
- cryptic
Economic Importance for Humans: Positive
Although Alaskan hares are seldom used as a food source for humans, the meat is said to be quite tasty and Arctic people will eat them when necessary. They are more commonly trapped for fur, used to make lining for shoes and robes. They are also a popular sport hunting species.
- Positive Impacts
- food
- body parts are source of valuable material
Economic Importance for Humans: Negative
As herbivores, Alaskan hares could cause damage to gardens, but this does not seem to be much of a problem among Arctic people.
Conservation Status
Lepus othus is described in "Mammal Species of the World" as rare and decreasing in range and numbers. However, none of the major conservation organizations list them among endangered or threatened species.
-
- IUCN Red List
-
Least Concern
More information
-
- IUCN Red List
-
Least Concern
More information
-
- US Federal List
- No special status
-
- CITES
- No special status
Other Comments
Lepus othus is quite similar to L. arcticus and L. timidus. Molecular data suggest these three are conspecific, while morphological data separate them. All are found in different geographic regions.
Contributors
Lisa DeBruine (author), University of Michigan-Ann Arbor, Phil Myers (editor), Museum of Zoology, University of Michigan-Ann Arbor.
Glossary
- Nearctic
-
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
- bilateral symmetry
-
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
- chemical
-
uses smells or other chemicals to communicate
- crepuscular
-
active at dawn and dusk
- cryptic
-
having markings, coloration, shapes, or other features that cause an animal to be camouflaged in its natural environment; being difficult to see or otherwise detect.
- endothermic
-
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
- folivore
-
an animal that mainly eats leaves.
- food
-
A substance that provides both nutrients and energy to a living thing.
- herbivore
-
An animal that eats mainly plants or parts of plants.
- motile
-
having the capacity to move from one place to another.
- native range
-
the area in which the animal is naturally found, the region in which it is endemic.
- saltatorial
-
specialized for leaping or bounding locomotion; jumps or hops.
- sedentary
-
remains in the same area
- sexual
-
reproduction that includes combining the genetic contribution of two individuals, a male and a female
- solitary
-
lives alone
- tactile
-
uses touch to communicate
- tundra
-
A terrestrial biome with low, shrubby or mat-like vegetation found at extremely high latitudes or elevations, near the limit of plant growth. Soils usually subject to permafrost. Plant diversity is typically low and the growing season is short.
- young precocial
-
young are relatively well-developed when born
References
"Arctic Hare" (On-line). Accessed November 22, 1999 at http://tqjr.advanced.org/3500/arctic_hare.html.
"Hares" (On-line). Accessed November 22, 1999 at http://www.state.ak.us/local/akpages/FISH.GAME/notebook/smgame/hares.htm.
1993. "Mammal Species of the World" (On-line). Accessed November 19, 1999 at http://www.nmnh.si.edu/cgi-bin/wdb/msw/names/query/26059.
Bee, J. 1956. Mammals of Northern Alaska on the Arctic Slope. University of Kansas: Laurence, Museum of Natural History.
Best, T., H. Hill. 1994. Lepus othus. Mammalian Species, 0(458): 1-5.
Demboski, J. "Lepus othus (Alaskan Hare)" (On-line). Accessed November 22, 1999 at http://zorba.uafadm.alaska.edu/museum/mammal/AK_Mammals/Lagomorphs/othus.html.
Nowak, R. 1999. Walker's Mammals of the World, v. II, 6th ed.. Baltimore: The Johns Hopkins University Press.