The second volume of the book series describes in a compact form the colour canaries and the fascinating breeding of carduelid hybrids. The author gives an overview of the history of genetics and the mechanisms of plumage colouration. The latest scientific findings are included. All currently bred and internationally recognised varieties of colour canaries are described in words and pictures. New are the colour descriptions according to the RAL colour system. Furthermore, there are valuable hints on breeding hybrids between canaries and other carduelids or between different carduelid species. Many mating is discussed and presented with pictures. These topics are rounded off with the necessary hints for participation in exhibitions and bird evaluations. In the appendix you will find a whole series of tables for the most diverse mating between individual canary colours.