This discussion was first published as part of the 2012 Red List update, but remains open for comment to enable reassessment in 2014.
Tooth-billed Pigeon Didunculus strigirostris has been listed as Endangered on the IUCN Red List since 2000 because its numbers were believed to have declined rapidly to fewer than 2,500 mature individuals following the effects of cyclones on its native Samoan forest during the 1990s. An eleven month survey in 2005-2006 reported the species from only ten locations, and the population was estimated to number only a few hundred , although the remote and largely intact uplands of Savai’i remain largely unsurveyed (MNRE 2006). It is unclear whether, since 2006, the species has declined further and new information is urgently required to clarify recent records of Tooth-billed Pigeon. At the same time, if the apparent paucity of recent records reflects a further population decline in recent years, a conservative outlook suggests its global population may have been reduced to fewer than 250 mature individuals, with 50 or fewer individuals in each subpopulation, qualifying the species as Critically Endangered under criterion C2ai with an continuing decline in progress. Comments and recent records are invited.
Ministry of Natural Resources & Environment (MNRE), Samoa (2006) Recovery plan for the Manumea or Tooth-billed Pigeon Didunculus strigirostris. Government of Samoa.