The Havana, also called the Havana Brown, was developed in Britain in the 1950s by pairing chocolate-carrying Siamese cats with black domestic shorthairs. The result is a glossy chocolate coat, brown whiskers, green eyes, large forward-tilted ears and a squared-off muzzle on a medium, muscular body of roughly 6 to 10 pounds. Lifespan is commonly 10 to 15 years.
Havanas are curious, people-focused cats that like to be involved in whatever the household is doing, often patting things with a paw. Many chat in a softer voice than a Siamese. The short coat is low-maintenance. The breed is rare, so in Chicago you're more likely to meet brown shorthairs or Havana mixes than a registered Havana, and each cat's personality matters more than the label.