First posted 06:01am (Mla time) April 07, 2006
Inquirer


Editor's Note: Published on page A1 of the Apr. 7, 2006 issue of the Philippine Daily Inquirer
TWO NEW SPECIES have been found in the Philippines, one of the world's biodiversity hot spots facing environmental degradation and deforestation.
A brightly plumaged parrot and a long-tailed forest mouse unique to the country have been discovered in the vanishing rain forest of Camiguin Island, US-based researchers said yesterday.
Camiguin, a volcanic island in northern Mindanao, is a treasure trove of fauna, and already had endemic species of rodents and frogs before the discovery of the rusty brown mouse and the green hanging parrot, known among locals as "Colasisi."
But Camiguin's wildlife is at risk from deforestation, warned researchers, writing in the April 5 issue "Fieldiana: Zoology," a peer-reviewed, scientific journal about biodiversity research published by the Chicago-based Field Museum of Natural History.
"Knowing that at least 54 species of birds and at least 24 species of mammals live on Camiguin and that some of these animals are found nowhere else on earth, makes us realize how important this island is," said Lawrence Heaney, curator of mammals at the Field Museum and coauthor of several of the reports in the publication.
"For these animals to survive, we've got to save the dwindling forests where they live," he said in a press release issued by the museum.
Severely deforested
Blas Tabaranza Jr., director of the Terrestrial Ecosystems Project of the Haribon Foundation in Manila, said the Philippines was increasingly recognized as a global center for biodiversity, with exceptionally high levels of endemism or the state of being restricted to or peculiar to a locality or region.
"Unfortunately, the Philippines has also vaulted into notoriety as one of the most severely deforested tropical countries in the world," Tabaranza, a co-author of several of the Fieldiana reports, said in the press release.
The Philippines hosts a wealth of endemic flora and fauna but more than 70 percent of its original forests have been destroyed.
Camiguin was once almost entirely covered by rain forest but by 2001, logging, agriculture and human settlement had reduced the forest cover to only 18 percent. Half of the island, a popular diving destination, is covered with coconut plantations.
Conservation priority
The scientists have declared Camiguin's rain forest to be a key global conservation priority. Efforts to protect the remaining rain forest in which these animals live as a national park have been under way for several years, in collaboration between The Field Museum, Haribon Foundation, the local government and the Philippine Department of Environment and Natural Resources.
The two new species were discovered as the result of recent and earlier field studies.
The new species of parrot was known to locals because of its value in the pet trade. The bird's throat and thighs are bright blue and the top of its head and tail are brilliant scarlet-orange.
Males and females have identical plumage, which is quite unusual in this group of parrot.
The description is based on previously unstudied specimens in The Field Museum and the Delaware Museum of Natural History collected in the 1960s by D.S. Rabor. The name for the new species is Loriculus camiguinensis, or Camiguin Hanging-parrot.
Distinctive
"This description is based on a series of specimens that had been part of The Field Museum's collections for almost 40 years, so our work highlights the value of collecting and preserving scientific specimens, because you may not initially realize the significance of specimens," said John Bates, curator of birds and chair of zoology at The Field Museum, and a co-author of one of the Fieldiana reports.
"If we did not have a series of specimens from Camiguin and additional series of Hanging-parrots from other Philippine islands, we probably would have assumed that the single bird that prompted our investigation was just odd-looking, and we would not have been able to recognize it as distinctive," Bates said.
Overlooked
One of L. camiguinensis' characteristics that was key to identifying it as a new species is the fact that its plumage is relatively dull compared to other Philippine hanging-parrots.
This is consistent with the documented tendency of some isolated bird populations to lose their bright plumage, the authors noted.
Because L. camiguinensis has not been recognized as a separate species, little is known about its habits, and it has been overlooked in terms of conservation. The discovery has spurred interest in the field studies needed to establish the population size and requirements as a prerequisite for conservation planning and action.
After learning about the Fieldiana manuscript, Thomas Arndt, a German parrot enthusiast, made a trip to Camiguin to look for these birds. He photographed the parrots and was preparing a publication about his findings.
New even to locale
The mouse, discovered high on the steep slopes of one of the island's volcanoes, was new to locals.
The rusty-brown rodent, known as Apomys camiguinensis, has large eyes and ears and feeds mostly on insects and seeds.
The description is based on mice captured on Camiguin during a biological survey Heaney and Tabaranza conducted in 1994 and 1995.
In 2002, Heaney, Tabaranza and Eric Rickart, of the Utah Museum of Natural History, described a different species of forest-living rodent, Bullimus gamay, from Mt. Timpoong, the same mountain where the new mouse was collected.
A frog (Oreophryne nana) named in 1967 had been thought to be the only vertebrate restricted to the island prior to the surveys by Heaney and Tabaranza.
Deserves int'l attention
"Very few states in the United States, and few countries in Europe, have four endemic species of vertebrates, making it clear why tiny Camiguin Island is deserving of international attention," Heaney said.
"And it is almost certain that other organisms in Camiguin are also endemic; they just have not been studied yet."
Camiguin is only 265 square kilometers. It has been continuously isolated from its neighbors, even during the Ice Age of the Pleistocene, when sea levels dropped 120 meters below present levels. This isolation contributed to the differentiation of the island's animals. With a report from Inquirer wires
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