The American Pet Products Association's 2007 National Pet Owners Survey provided a detailed look at what kinds of pets Americans favor.
Freshwater fish are kept as pets by more than 142 million people worldwide. Domestic freshwater fish are commonly kept in aquariums or fish tanks as pets.
Over 88.3 million households worldwide include a cat among their pets. If given the best possible care and diet, a domestic cat has a 20-year lifespan.
There are more than 74.8 million canine owners worldwide. They are well-known for their intelligence, loyalty, and the close relationships with humans.
More than 16 million pet owners have birds as a pet. Birds make great companions because they are so sociable and engaging.
In the United States alone, over 13.8 million people keep horses as pets. Horses use a combination of body language, and scent marking to convey meaning to one another.
More than 13.7 million households include a reptile among their pets. Snakes, lizards, turtles, and tortoises are typical pets for people who enjoy animals.