The most notable mammal characteristics include having hair or fur, having live births, and feeding their young milk. What animals are Mammals? There are nearly 6,500 publicly recognized mammal species with more being discovered all the time. Popular mammal examples include cats, dogs, horses, elephants, whales, and humans. Are whales mammals? Yes! More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.