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.
Taxonomy and Species of Wolf. Wolves are part of the canine family, also known as Canidae. Within the Canidae, seven species are termed 'wolf', of which only four are considered 'true' wolves. The most threatened wolf species include the Red wolf and Ethiopian wolf. - the Grey Wolf (Canis lupus), - the Red Wolf (Canis rufus),