The spotted green pigeon or Liverpool pigeon (Caloenas maculata) is a species of pigeon of unknown provenance which is most likely extinct. It was first mentioned and described in 1783 by John Latham, who claimed to have seen two specimens and a drawing depicting the bird. The taxonomic relationships of the bird were long obscure, and early writers suggested many different possibilities, though the idea that it was related to the Nicobar pigeon (C. nicobarica) prevailed, and it was therefore placed in the same genus, Caloenas. Today, the species is only known from a specimen kept in World Museum, Liverpool. Overlooked for much of the 20th century, it was only recognised as a valid extinct species by the IUCN Red List in 2008. In 2014 a genetic study confirmed it as a distinct species relat