First sighting of a pair of Ryukyu robin Larvivora komadori Temminck, 1835 (Aves, Passeriformes) during breeding season on Jeju Island, Republic of Korea: a nesting attempt?

The Ryukyu robin (Larvivora komadori Temminck, 1835) is an endemic inhabitant of the Ryukyu Archipelago, Japan. In 2018, we made several birding excursions to Jeju Island, Republic of Korea. Within the 1100 Altitude Wetland protected area on May 28 and May 30 we encountered a pair of birds, which, according to reference literature and bird guides we identifi ed as Larvivora komadori. That was the fi rst visual sighting of the Ryukyu robin during the breeding season on Jeju Island, which is separated from the nearest breeding site by more than 200 kilometers of open sea. This fact can be regarded as a potential ability for this endemic island species to spread to new islands. Possible pathways for natural introduction of the Ryukyu