Culturally, ecologically and economically, our natural heritage – i.e. wildlife in general and migratory species in particular – is of immeasurable value. By spreading seeds, controlling pests and providing food migratory birds help sustain human life. Their cyclical journeys herald the changing seasons, filling the skies with their V-shaped formations in the spring and autumn. They feature in myths and legends; their epic journeys that can span oceans and continents, their plumage, courtship dances and aerobatics inspire awe and wonder. Birdwatching is a worldwide industry which has millions of participants, is worth billions of dollars, is sustainable and can bring considerable benefits to the environment.