The volcanic islands of the Lesser Antilles, built by eruptions and shaped by the ocean surrounding them, are some of the most biodiverse landscapes of the Caribbean, where humans have developed a special relationship with their wild surroundings.On Mayreau, Liz joins a team of residents repairing their vibrant coral, which has been damaged by disease. On neighbouring Union Island, she goes on patrol with a local environmental army to help protect the Union Island gecko, one of the smallest reptiles in the world.In St Vincent, Liz hikes one of the most active volcanoes in the region – La Soufriere – to find the brightly coloured St Vincent parrot. And in her ancestral home of Trinidad, she relives one of her most magnificent wildlife encounters: the flight of the scarlet ibis.