Felis
rufus
(Bobcat)
Description:
The bobcat
is a tawny color often with a reddish
tone, with black spotting that is not real distinct.In winter their color is
more grayish.They have a “bobbed” tail that is short and has 2 or 3 black bars
with a black tip above, but it is whitish underneath.The lynx tail is black
on both sides.Their face often has thin, black lines, that lead into cheek ruffs.The
cheek ruffs do not extend into the beardlike extensions of the lynx.Their ears
are slightly tufted, but less so than the lynx.Their weight varies from 14to
68 pounds (6.4-31 kg), males are generally larger than females.Total body length
is about 28 to nearly 50 inches (710-1250 mm), tail length is about 4 to 7 inches
(100-170 mm).
Range:
They are generally found from southern Canada
across the U. S. south to Mexico.Their
populations are isolated and only found in suitable habitat through the Midwest
and eastern part of the U. S.They are
more abundant and widespread throughout the Rocky Mountain states and to the
west coast.
Habitat:
Found in various habitats, including
deciduous-coniferous
woodlands and forest edges,
swamps, brushlands, and areas with thick undergrowth. In Idaho, found from deserts
to rocky mountains near timberline.
Diet:
Prefers small mammals, especially
lagomorphs, but will occasionally eat birds, other invertebrates, and carrion. West-central Idaho study
reported voles were primary winter prey. Southeastern Idaho studies found bobcats
preyed primarily on jackrabbits, but switched to small mammals when rabbit numbers
declined. They have been known to prey on larger mammals such as small pronghorns
or deer, but only occasionally.
Ecology:
Mainly nocturnal/crepuscular
, but sometimes diurnal
in winter. When inactive,
occupies rocky cleft, cave, hollow log, space under fallen tree, etc.; usually
changes shelter daily. Home range is generally less than 100 km2
(often much less); male's range is greater than female's. West-central Idaho
study found summer home range was approximately 4 times larger than winter home
range. population density
is 1/3.9 km2
in southern range, to 1/12.9 km2 in north (Idaho study reported density
of 1/23.3-29.0 km2). Individuals are solitary except when breeding.
Southeastern Idaho study found bobcat numbers declined as rabbit numbers declined
due to fewer females raising litters. Home ranges also increased.
Reproduction:
Breeds mid-winter through spring (possibly
any time of year in some areas). Female produces 1 litter of 1-7 young (average
2.8 in southeastern Idaho), except in southern range, where second litter may
be born in early August. Gestation
lasts 50-60 days. Both
parents feed young while kits are in den. Young are weaned
at about 2 mo, stay with
mother until early fall, and first breed usually at 1-2 yr.
Conservation:
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Global Rank: | G5 |
State Rank: | S4 |
Important State References:
Knick,
S.T. 1990. Ecology of bobcats relative to exploitation and a prey decline in
southeastern Idaho. Wildl. Monog. 108:1-42.