You are using Internet Explorer 8 to view this site. IE8 is a 6-year-old browser that does not display modern web sites properly. Please upgrade to a newer browser to make best use of this site. Contact your local library branch if you require assistance. For more information, see this FAQ page.
Three years of shooting were needed by five teams in order to follow bird migrations flying over the seven continents: from one pole to another, from the seas to snowcapped mountains, from the canopy of heaven to mangroves and swamps.