Animal Life: Part 1, Chapter 12: Sirens; Chapter 13: Cetaceans, by the famous author Alfred Edmund Brehm, is a fascinating journey into the world of various animals. In this book, you will find interesting essays about sirens, mysterious sea creatures, and majestic cetaceans that are impressive in their size and power. The author describes in detail the customs, appearance and behavior of these animals, making the book interesting and useful for all fans of nature and the animal world. Het Leven der Dieren is a wonderful source of knowledge about the most interesting inhabitants of our planet.