Taxidea
taxus
(American Badger)
Description:
The badger's fur is grayish
and grizzled with black. It has a "badge-like"
black marking on its face, which is accentuated by white that extends from
the face rearward. The badger body
is well suited for digging; it is short and stout and somewhat flattened. Its
ears are rather short and its snout appears slightly upturned. Its legs are
short and stout, black colored and well suited for digging. The foreclaws are
long and curved and its hind claws are shovel-like. Badgers always adopt a low
profile, seeming to hug the ground. Total length is 24 to 30 inches (600-750
mm), their tail is about 4 to 6 inches (105-150 mm) and they weigh up to 26
pounds (12 kg).
Range:
Badgers range from the Great Lakes states west to Pacific Coast, and from
Canadian Prairie Provinces, south to Mexican Plateau.
Habitat:
Prefers open areas with enough soil to dig in, but can be found from high
alpine country to low valleys. They may also frequent brushlands with little
groundcover. They seem especially common in large grass and sagebrush meadows
and valleys. In Idaho, this species occurs in shrub steppe, in agricultural areas,
and in open woodland forests.
Diet:
They feed primarily on small rodents such as ground squirrels, pocket gophers,
kangaroo rats, prairie dogs, and mice, most of which they capture by digging
into the burrows of these small mammals. But, they will also eat scorpions,
insects, snakes (even rattlesnakes), lizards, and birds, especially when rodent
population is low. An Idaho study reported that individuals preyed on Townsend's
ground squirrels, lagomorphs, deer mice, kangaroo rats, and various arthropods.
Ecology:
They are usually active day and night, but primarily nocturnal activity has been reported.
They remain underground in burrows when inactive. They use permanent dens in
the winter, but during the summer they often dig a new den each day. In one
Idaho study, individuals rarely stayed underground for more than 24 hours except
in the winter. One female emerged from her winter den only once during a 72
day period. A southwestern Idaho study reported winter underground stays from
several days to several weeks. Their population density averages 1 badger per
2.6 km2 in prime open country, although a southeastern Idaho study reported
5 badgers per km2 that were associated with ground squirrel populations in areas
of sparse vegetation. One Idaho study reported a home range of less than 4 km2,
while another in-state study found that adult home range averaged 2.4 km2 Most
young-of-year badgers dispersed during their first summer (up to 110 km). Home
ranges of badgers tend to overlap, but individuals are basically solitary. Since
badgers dig burrows frequently, both in search of prey and for shelter, their
burrows are common in badger habitat. Elliptical in shape, about 8 to 12 inches
high and 12 to 18 inches wide, their burrows are important ecologically for
other species. Various small mammals, such as ground squirrels and rabbits use
their burrows for shelter, as do snakes and other vertebrates. Badgers have
been maligned by humans because their burrows can be injurious to livestock,
but rodent control and the cover their burrows provide for other wildlife probably
offset the few leg injuries to livestock. Badgers are considered to be solitary,
but recently there have been reports and sightings of badgers and coyotes hunting
together. Coyotes take advantage of rodents escaping from burrows being excavated
by badgers, and badgers take advantage of rodents escaping from coyote foraging
by scurrying into burrows. This seems like an example of predator
mutualism. Badgers have earned a
reputation for their ferocity. When cornered they use what seems to be their
main lines of defense: either burrowing out of sight or hissing loudly and feigning
charges.
Reproduction:
Mating occurs mid- to late summer and even into early fall. implantation is delayed until December
to February. Females produce 1 litter averaging 3 (2 to 5) young,
born from March to early April (Idaho study found 1.4 young). The young are
altricial , being blind and only
partially furred. Females nurse their young through June and young leave their
family groups in early fall. The male will occasionally stay close to the female
when young are in the nest burrow. An Idaho study reported 30% of young-of-year
females bred, and males reached sexual maturity as yearlings.
Conservation:
Status: | Unprotected nongame species |
Global Rank: | G5 |
State Rank: | S5 |
Important State References:
Messick, J.P. and M.G. Hornocker.
1981. Ecology of the badger in southwestern Idaho. Wildl. Monog. 76:1-53.