Pullao Wetlands, adjacent to Tierra Chiloé, is known for its tidal flat that receives thousands of migratory birds each year. This site plays a crucial role for them upon their arrival to the archipelago for different reasons from different parts of the world.

May 9th was World Migratory Bird Day. This day promotes awareness of the importance of the conservation of migratory birds and their habitats, the threats these bird species face, their ecological importance and the need to cooperate in order to protect them.

More than 20 migratory bird species come to Chiloé every year. Some come from the south, others from the north and still others from the Andes Mountains. Their favorite spots are coastal marshes like Pullao Wetlands and evergreen forests, where they build nests, rest and feed.

Migration occurs according to changes in climate, availability of food and reproductive needs. It is a seasonal cycle of comings and goings during which these birds seek to take advantage of favorable conditions in different areas.

Migratory birds can be classified into different groups based on their movements: