Are tortoiseshell cats and calico cats the same thing?

The tortoiseshell pattern is often made up with several colours such as black and red (orange), but can also include a mixture of brown, chocolate, cream, or cinnamon. The size of the patches can vary from a fine speckled or mottled pattern to large areas of colour. The colours and patterns widely vary from cat to cat.

A calico cat is white with tortoiseshell-type patches of colour, typically black and red, although other colours can be present, also.