The Juan Fernández Petrel, Pétrel De Juan Fernandez, or Peterel De Las Juan Fernádez (Pterodroma externa) is a species of seabird in the Procellariidae family. It is found in Australia, Chile, French Polynesia, Japan, Mexico, New Zealand, and the United States. Its natural habitats are temperate forests, subtropical or tropical dry lowland grassland, and open seas. It is threatened by habitat loss.