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.
There are three species of wolves in the world-the grey wolf (Canis lupus), the red wolf (Canis rufus) and the Ethiopian wolf ((also known as Abyssian wolf, Ethipioan JAckle â¦ , and Simain fox))(Canis simensis).    The grey wolf, of which there are numerous subspecies, is found across North America and Eurasia.