Giant Ground Dove (Alopecoenas nui)
The Giant Ground Dove is known only from subfossil bones which were found on the islands of Mangaia, Cook Islands; Kamaka, Gambier Islands; Hiva Oa, Tahuata and Ua Huka, Marquesas as well as Huahine, Society Islands.
The species was sympatric on the Cook-, Gambier- and Society Islands with the smaller Polynesian Ground Dove (Alopecoenas erythroptera (Gmelin)) and on the Marquesan Islands with the Marquesas Ground Dove (Alopecoenas rubescens (Vieillot)), and perhaps with additional, yet extinct species.
The Giant Ground Dove was no true giant, but was still larger than all its Polynesian congeners, reaching a size of about 36 cm.
 David W. Steadman: Extinction and Biogeography of Tropical Pacific Birds. University Of Chicago Press 2006
 Jean-Claude Thibault; Alice Cibois: From early Polynesian settlements to present: bird extinctions in the Gambier Islands. Pacific Science 66(3): 1-26. 2011
 Knud A. Jønsson; Martin Irestedt; Rauri C. K. Bowie; Les Christidis; Jon Fieldså: Systematics and biogeography of Indo-Pacific ground-doves. Molecular Phylogenetics and Evolution 59: 538-543. 2011