Over the past decade there has been considerable progress in understanding how the brains of many species process visual and auditory information relevant to their ecological niche. However, it is perhaps the last three decades that have witnessed the truly remarkable advance in our knowledge in these domains, and this has happened because of the enormous volume of dedicated work undertaken by a very large number of neuroscientists around the world. Perhaps the best indication of this blossoming of our knowledge in the field of visual and auditory information processing can be seen by inspecting the huge volume of research targeting these areas that occurs in the Society of Neuroscience Abstracts every year.