Negros species vulnerable to extinction
1st of two parts
On Tuesday last week, the Philippines joined the commemoration of the World Wildlife Day, which was declared during the 68th session of the United Nations General Assembly in December 2013.
The secretariat of the Convention on International Trade in Endangered Species of Fauna and Flora, or commonly known in conservation community as CITES, is taking the lead in implementing the World Wildlife Day every 3rd day of March.
The Philippines is a signatory to this convention, which is intended for the protection of threatened species of the world. This inter-government treaty also aimed to ensuring that the international trade of wild animals and plants does not threaten the species survival in the wild.
The celebration of the World Wildlife Day is very important to the Philippines, because many of our endemic flora and fauna are already included in the Red List of Threatened Species of the IUCN – World Conservation Union and the Department of Environment Natural Resources. These species are classified as critically endangered, endangered or vulnerable to extinction. The determination of threatened species is based on its population estimate in the wild and the degrees of threats facing its existence.
Negros Island is of major concern when it comes to threatened faunal species. It has numerous endemic species that are already at the brink of extinction in the wild. For instance, the Negros fruit dove (Ptilinopusarcanus), discovered in Mount Kanla-on Natural Park from a single specimen in 1953, is already considered a lost species. It has never been recorded elsewhere after it was known to exist. The Birdlife International recommends thorough field survey of the Negros fruit dove in the MKNP and other sites of Negros and Panay to determine if the species is still extant.
Another crucial species known only to occur in Negros, Panay and Guimaras is the Writhed-billed hornbill (Rhabdotorrhinuswaldeni), also known as Rufous-headed hornbill and Walden’s hornbill, which is suspected to be functionally extinct in the wild in Negros, according to IUCN, since it has never been recorded in the island for more than 10 years. However, in the survey conducted by the Philippines Biodiversity Conservation Foundation Inc. last year, the species was rediscovered in Northern Negros Natural Park. The species remains as critically endangered in terms of its threat category.
The status of the Visayan warty pig (Suscebifrons) did not improve through the years. From vulnerable, its threat category has been elevated to critically-endangered because dangers to its existence in the wild are still very high. The population of this species is now limited in Negros, Panay and possibly in Ticao Island. It is already extinct in its former range in Cebu, Guimaras and Masbate. The late William Oliver, a British biologist who devoted more than two decades of his life in conserving the Philippines’ endemic wildlife, described the Visayan warty pig as the most threatened species of pig in the whole world.
The Negros Naked-backed fruit bat or Philippine Bare-backed fruit bat (Dobsoniachapmani) was formerly declared extinct because it has never been recorded since 1964. This species was formerly known to occur only in Negros until it was discovered in Cebu in 2001 and was later on rediscovered in southern Negros Occidental in 2003. The species remains classified as critically endangered because its survival is still bleak, especially since the lowland forests in Negros, where this fruit dove is known to occur, are now very limited. (To be continued)*