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Home -> Kingdom Animalia -> Phylum Chordata -> Subphylum Vertebrata -> Class Mammalia -> Order Macroscelidea -> Family Macroscelididae -> Species Macroscelides proboscideus

Macroscelides proboscideus
short-eared elephant-shrew
(Also: short-eared sengi)



2008/08/31 07:31:22.217 GMT-4

By Alyce Dohring

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Macroscelidea
Family: Macroscelididae
Genus: Macroscelides
Species: Macroscelides proboscideus

Geographic Range

The short-eared elephant shrew mostly inhabits Namibia, southern Botswana, and South Africa.

(Shaw, 1983)

Biogeographic Regions:
ethiopian (native ).

Habitat

The animal only lives in desert and semi-desert areas of the countries in which it is found. It hides in the sparse grass cover or bushes that are a part of these dry areas. They also burrow into the sand.

(Smith, 1829)

Terrestrial Biomes:
desert or dune ; scrub forest .

Physical Description

Mass
40 to 50 g; avg. 45 g
(1.41 to 1.76 oz; avg. 1.58 oz)


Length
100 to 110 mm; avg. 105 mm
(3.94 to 4.33 in; avg. 4.13 in)


Basal Metabolic Rate


Compared to members of the other elephant shrew genus, the short-eared elephant shrew has shorter and rounder ears and lacks the pale rings around the eyes that are typical of those animals. The tail is hairy, with a visible gland on the underside. On the hind feet, the first digit is small and has a claw. The fur is usually long, soft, and is an orange, brown or grayish color on top and a lighter color on the underside. Adults often weigh between 40-50 grams with 100-110mm long bodies and 97-130mm long tails. Defining skull features include an enlarged auditory bullae and the appearance of three upper incisors, as well as a short rostrum and crowded teeth. Females also have six mammae.

(Rathbun & Fons) (Unger, online)

Some key physical features:
endothermic ; bilateral symmetry .

Reproduction

Breeding season
August and September

Number of offspring
1 to 2; avg. 2

Gestation period
56 days (average)

Birth Mass
7 g (average)
(0.25 oz)
[External Source: AnAge]


Time to weaning
16 to 25 days; avg. 20.50 days

Age at sexual or reproductive maturity (female)
43 days (average)

Age at sexual or reproductive maturity (male)
43 days (average)

The breeding season is in the warm, wet months of August and September. A female may have many pregnancies during one breeding season. (Shaw, 1934)

Mating systems:
monogamous .

Gestation for these animals is typically about 56 days and only two young are born, sometimes one. They are born in a very precocial state; they can run within a few hours after birth, are large in size, and are born with hair and their eyes open. Babies are weaned at 16-25 days and reach sexual maturity after about 43 days. (Rathbun & Fons)

Key reproductive features:
gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (internal ); viviparous .

The female does not make a nest for the young; however, she will find a sheltered area and give birth to the young in it. The mother does not guard her young and is gone from the litter most of the time, coming back once a day to feed the young. (Smith, 1829)

Parental investment:
precocial ; female parental care .

Lifespan/Longevity

Average lifespan (wild)
1.50 years

Extreme lifespan (wild)
1 to 2 years

Average lifespan (captivity)
3.50 years

Extreme lifespan (captivity)
3 to 4 years

Average lifespan (captivity)
8.70 years
[External Source: AnAge]


In the wild, these animals only live for 1-2 years. In captivity they can live as long as 3-4 years.

(Unger, online)

Behavior

These animals are mostly diurnal except when threatened by predators. They are usually solitary animals in the wild except when they come together to mate. When mating, females fend off other females and males fight off other males.

These elephant shrews take refuge under bush or rocks but also dig burrows or use shelters previously built by other small species, typically rodents. The animals use the burrows like roads to get from place to place. They keep them clean by kicking any debris that clogs their tunnels. They also sand bathe to help keep clean.

(Unger, online) (Smith, 1829)

Key behaviors:
motile ; solitary .

Food Habits

Short-eared elephant shrews typically eat insects, usually termites and ants, and other small invertebrates. They may also feed on plant parts such as roots, shoots, and berries.

(Unger & Kratochvil, 1999)

Primary Diet:
carnivore (insectivore , eats non-insect arthropods).

Animal Foods:
insects; terrestrial non-insect arthropods.

Plant Foods:
leaves; roots and tubers; fruit.

Predation

Known predators

The animal usually jumps from bush to bush during the day or basks in the sun, but if harassed by diurnal predators, such as hawks, it switches its schedule and looks for food at dusk, hiding in bushes during the day. Also, by using their forelimbs these animals can dig tunnels very rapidly to quickly escape predators. Few predators prey on the young because the young mature and leave the nest shortly after birth.

(Lincoln Park Zoo, online) (Smith, 1829)

Ecosystem Roles

These elephant shrews help move soil around to create their burrows as well as recycle vacant burrows left from rodent species.

(Unger, online)

Key ways these animals impact their ecosystem:
soil aeration .

Economic Importance for Humans: Positive

Possible helpful soil movement from burrowing activity.

(Unger, online)

Conservation Status

IUCN Red List: [link]:
Least Concern.

US Federal List: [link]:
No special status.

CITES: [link]:
No special status.

Due to destruction of its habitat, this species is labeled “vulnerable” by the IUCN.

(Shaw, 1983)

Contributors

Alyce Dohring (author), University of Michigan.
Kate Teeter (editor), University of Michigan.

References

Lincoln Park Zoo, "Short-eared Elephant Shrew" (On-line). Accessed October 4, 2001 at http://www.lpzoo.com/tour/factsheets/mammals/elephant_shrew.html.

Rathbun, G., R. Fons. Grzimek's Encyclopedia of Mammals Vol 1. New York: Mc Graw-Hill Publishing Co..

Regina, U. "Short-eared Elephant Shrew" (On-line). Accessed October 4, 2001 at http://www.unet.univie.ac.at/~a9201952/Englisch/welcome.htm.

Shaw, 1934. Mammals of Southwest Africa, Vol 1.

Shaw, 1983. The Mammals of Southern Africa Subregion.

Smith, A. 1829. Walker's Mammals of the World. Fourth Edition, Vol 1.. Baltimore: John Hopkins University Press.

Unger, R., H. Kratochvil. 1999. Feeding Preferences of Short-eared Elephant Shrews (Macroscelides proboscideus, Smith 1829). Zoology 102, Supplement II: 87.

2008/08/31 07:31:27.259 GMT-4

To cite this page: Dohring, A. 2002. "Macroscelides proboscideus" (On-line), Animal Diversity Web. Accessed September 05, 2008 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Macroscelides_proboscideus.html.

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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