Birds are wonderful creatures that embellish forests, fields and cities with their presence. They also live in the sea, coasts and marshes. In the mountains and in the valleys. From the poles to the equator. In full evolutionary expansion they have conquered all the places of the Planet. They are allies of man because many species control pests of agricultural crops and forests. They are the object of that modality of ecotourism called birdwatching. They make us happy with their varied shapes, colors and trills. For these reasons we must know them, love them and conserve them.