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Canis lupus - Grey wolf
Range:  North America and Eurasia
Size:  100 - 175 lb (45 -  79 kg)

The grey wolf is the largest living member of the family Canidae.  The largest individuals tend to occur in the northern forests of North America, with weights of 175 lb (79 kg) having been recorded.  A weight of 100-125 lb (45 - 57 kg) is much more typical, however.

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grey wolf
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Grey wolves from the hotter, drier parts of the world rarely exceed 50 lb (23 kg).  There is a wide size range among the various subspecies of grey wolf.  Equally variable is the colour of the grey wolf.  In fact, many "grey" wolves are not grey at all.  They can be solidly white or solidly black, and virtually every hue within the grey, brown, and tan spectrums.
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Compare the photos shown below.  The animals on the left are arctic wolves (C. lupusarctos), and the nearly all black one at right is a member of a subspecies from farther south.  Generally, the fur of a wolf tends to be heavily mottled with various shades.  Many wolves have a large, dark patch on their back which contrasts with their dominant coat colour.  Contrasting dark and light facial markings are also common.  Also occurring in wolves is albinism, the lack of pigmentation in an animal.  However, as is the case with virtually all mammalian species, instances of truly albinistic wolves (with pink eyes) are very rare.  Colouration is not especially useful in classifying grey wolves, since it is such a highly variable characteristic, even within individual packs or litters.  Regardless of the colouration of the parents, a wolf litter can contain pups of a multitude of hues.
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Arctic grey wolf
black grey wolf
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In North America, the 24 recognized subspecies of Canis lupus are/were:
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alces (extinct) 
arctos 
baileyi 
beothucus (extinct) 
bernardi (extinct) 
columbianus 
crassodon 
fuscus (extinct)
griseoalbus 
hudsonicus 
irremotus 
labrodorius 
ligoni 
lycaon 
mackenzii 
manningi 
mogollonensis (extinct) 
monstrabilis (extinct)
nubilus (extinct) 
occidentalis 
orion 
pambasileus 
tundrarum 
youngi
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In Eurasia, the subspecies are/were:
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albus 
arabs 
campestris 
chanco 
cubanensis 
desertorum
hattai (extinct?) 
hodophilax (extinct) 
lupus 
minor (extinct) 
pallipes
signatus
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Click here:to go to my page on the Mexican grey wolf, (C. lupus baileyi).

 
Click here:to go to the Grey Wolf Gallery.

 
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Photographs and other illustrations (where indicated) are © C. Campbell's NATURAL WORLDS.
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