The subject of this volume is two-fold. First, it gathers typical polarization patterns occurring in nature. Second, it surveys the polarization-sensitive ani- mals, the physiological mechanisms and biological functions of polarization sensitivity as weIl as the polarization-guided behaviour in animals. The monograph is prepared for biologists, physicists and meteorologists, espe- cially for experts of atmospheric optics and animal vision, who wish to under- stand and reveal the message hidden in polarization patterns of the optical environment not directly accessible to the human visual...