If this book has reached your hands it is because you love birds. There must be something that strikes you about birds and you decided to read them in this book. However, before you keep on reading I must warn you that this book should not be read by just anyone. If you like birds because you enjoy hearing them singing from a cage do not read this book. If you want to attract birds because you want to put them in a cage, then do not read this book. You may be searching for valuable information and you will find it here if you love wild birds, in particular migratory birds that have the ability to travel long distances. A person with the ability to become a host for a flying creature that flies many kilometres seeking shelter, food and rest can read this book. Only then, with the ability to give freedom to the guest hoping to repeat, year after year the unwritten but inevitable appointment, then you can read this book.