1. Gray wolf (Canis lupus): This is the most widespread and well-known wolf species. It encompasses various subspecies and includes the familiar gray wolf of North America, the Eurasian wolf, the Himalayan wolf, and the Indian wolf, among others.
2. Red wolf (Canis rufus): This species is critically endangered and found only in the southeastern United States. It is smaller than the gray wolf and has a distinctive reddish-brown coat.
It's worth noting that there are other closely related canids that are sometimes called "wolves," such as the Ethiopian wolf and the African wild dog. However, they are distinct species and not considered true wolves in the scientific classification.