Professor Nico Tinbergen is not only the largest ethologist, Nobel laureate, but also an excellent popularizer. His book "The World of the Silver Gull" belongs to the gold fund of non-fiction. The author, as it were, invites the reader to study the life of a silver gull with him and takes him step by step from the first observations to complex and witty experiments, from descriptions of phenomena that have not yet been understood to their interpretation and assessment. The book will be useful and interesting to the widest circle of readers - from zoologists to just nature lovers.