1 Canker sores are small, painful ulcers on the inside of the mouth, tongue, lips, or throat. 2  Symptoms of canker sores include small, painful, crater-like ulcers.  See a doctor if canker sores are accompanied by fever, last more than three weeks, or the affected individual has difficulty swallowing.
When people think of wolves, one species usually comes to mind: the gray wolf. The gray wolf is the largest wolf and the basis of legends. According to National Geographic, the breed was almost hunted to extinction in the lower 48 states of the United States. Even now, few exist outside Alaska.
Here is a list of the species and sub-species of wolves that can be found worldwide: 1  Gray Wolf - The Grey Wolf is the most common wolf species and has many subspecies. ** 2  Arctic Wolf. 3  Arabian Wolf. Eastern Timber Wolf. 4  Prairie wolf. 5  Eastern Canadian Wolf. 6  Ethiopian Wolf. 7  Indian Wolf. 8  Maned Wolf.