One of the most brilliant volumes in the whole New Naturalist series, Dr. Tinbergen's investigation into the life history and habits of the herring gull is already established as a classic work of modern animal behaviour studies.A charmingly written and exciting monograph, it tells us about the mind of a gull established on practically all the coasts of the northern half of the world; but it tells us also more than a little about the workings of our own minds.