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Albatrosses and petrels are among the most endangered seabird species worldwide. They face threats such as plastic ingestion, bycatch in fisheries, invasive predators at breeding sites, light pollution, and climate change. Many seabird species from Aotearoa New Zealand migrate to the eastern Pacific waters during the non-breeding season, following the abundant food availability of the Humboldt current. In this article, we compile observations of Thalassarche and Procellaria petrels in Ecuadorian waters from five information sources such as incidental tourist vessel observations, incidental fishermen observations, beach patrols, seawatching and GLS loggers. We provide strong evidence of the presence of Salvin’s albatross and White-chinned petrel in Ecuador, two species previously considered hypothetical for the country’s official bird list. Additionally, we present photographic evidence of a live Southern Buller’s albatross in Ecuador and document further observations of the black petrel, including its interactions with local fisheries. These records emphasize the importance of enhancing monitoring efforts to gain a deeper understanding of the ecology and conservation of Ecuador’s seabirds. They also highlight the necessity and advantages of collaboration between New Zealand and Ecuador concerning highly mobile bird species.