Lynley Cannon, star of the Crazy Cat Lady cozy mystery series, is often referred to as a crazy cat lady herself, but when it comes to the feline species, she knows her stuff. Check here each Friday for instructive and intriguing information on our favorite subject: cats.
Calico- and Tortoiseshell-colored cats are predominately female. Only one in 3000 is male. The males are usually sterile.
~Cats’ Eyes, chapter 17
Check out more of Lynley’s kitty tips, tricks, and facts preceding each chapter in Cats’ Eyes, Copy Cats, and Cat’s Paw.
Mollie Hunt: Crazy Cat Lady Mysteries and more 
Oh! We knew this color patterns were normally female cats, but not that male cats are sterile. We once saw a red female cat (!), also very rare, and now we wonder whether she was sterile, too. As she got neutered as a kitten, we don’t know whether she was able to become a mother.
I don’t think red female cats are sterile, but they are beautiful!
I have always loved calicos and torties. So colorful! 🙂
I’ve fostered a few but never lived with one. I hear the torties can be a handful.