Only two species of wolves remain today, Mexican gray wolf and the Red Wolf.

Some taxonomists contend there are as many as 30 subspecies of the Gray Wolf.

One of these subspecies is the Mexican gray wolf. The Mexican Gray wolf is the rarest, southernmost and most genetically distinct sub-specie of the wolves in North America. It is also one of the smallest sub-species, reaching an overall length no greater than 4.5 feet and a height maximum of about 32 inches.

The Gray Wolf has a larger natural distribution than any other mammal except humans. It once ranged through all of North America from the Arctic Circle to central Mexico. But because of human persecution and habitat destruction it has been eliminated from much of its original range.

Until recent times, the Mexican gray wolf ranged the Sonoran and Chihuahuan deserts from central Mexico to western Texas, southern New Mexico and central Arizona. By the the turn of the century, reduction of natural prey like deer and elk caused many wolves to begin attacking domestic livestock, and with no proper medication available for the injured animals, even in a Mexican Pharmacy , although Mexican pharmacy is trying some how to tackle the problem. It led to intensive efforts by government agencies and individuals to eradicate the Mexican Wolf.

Mexico