Most of us think our pets say a lot about who we are. Why else would we proudly proclaim our loyalty on T-shirts and in online profile pictures? Yet few scientists have rigorously investigated whether our choice of pet reveals anything about our personality, beliefs or lifestyle. Scientific American rounded up the smattering of available research and highlighted some of the more interesting findings in the infographic that starts below and continues on the next pages. Some information comes from peer-reviewed studies, but the bulk of the data derives from huge market surveys undertaken by interested parties in the pet industry, such as the American Veterinary Medical Association, which tracks pet populations, owner demographics and expenditures to follow how pet ownership in the U.S. changes over time. As you will see, these surveys reveal interesting things about people and the pets they love.