The term 'Cat and Bird Painter' refers to the Swiss-born artist Paul Klee (1879-1940). Klee was a prolific painter, printmaker, and draftsman who is known for his unique style of abstract art. He often combined elements of cubism, surrealism, and expressionism in his work, which often featured animals such as cats and birds. Klee's works are highly sought after and have been exhibited in major museums around the world.