Luzon Island is home to a large tree-dwelling rodent named Phloeomys pallidus. It is commonly known as the Northern Luzon giant cloud rat. The people of Luzon call the animal bu-ot.
The size of the Northern Luzon giant cloud rat is notably large for a rodent. Its total length from head to tail ranges between 75 and 77 centimeters. Adult body weight reaches 1.9 to 2.6 kilograms.
Thick and dense fur covers its entire body. The primary color pattern is pale white. It features a dark mask across the face and a dark ring around the neck.
Relatives from the Southern Luzon
German zoologist Alfred Nehring first recorded the species scientifically in 1890. That record officially established its scientific name, Phloeomys pallidus.
Despite its late 19th-century identification, its taxonomic status remains a subject of inquiry. The species shares a remarkably similar physical structure with the Southern Luzon giant cloud rat, Phloeomys cumingi.
Because of their physical similarities, the exact distinctions between the two species remain incompletely explained. Researchers still question whether Phloeomys pallidus is a distinct species or a regional variant of Phloeomys cumingi.
However, their fur color patterns generally offer a clear distinction. Phloeomys pallidus typically features lighter coloration, whereas Phloeomys cumingi generally displays darker tones.
Nocturnal Life in the Canopy
In terms of behavior, the Northern Luzon giant cloud rat spends nearly its entire life in trees. During the day, it hides inside old tree hollows or root crevices to rest and avoid predators.
As a nocturnal animal, it is most active after dark. It moves along tree branches to travel and find food. In the wild, it lives mostly a solitary life.
Its diet consists entirely of vegetation, ranging from leaves to fruits. It uses its claws and teeth to feed on young leaves and shoots. It also uses them to collect seeds and wild fruits.
Widespread Range Across Luzon
The Northern Luzon giant cloud rat maintains a broad population distribution in the Philippines. Its range spans at least 12 provinces, which extend from northern Luzon down to Laguna Province in the south.
Its primary range follows two major mountain chains on the island. A central population inhabits the Cordillera Central range. On the eastern side of Luzon, the species inhabits the Sierra Madre range.
The isolated populations also live in the western coastal region. They inhabit the hilly areas of Bataan and Zambales provinces.
The animal lives from coastal lowlands up to elevations of 2,200 meters above sea level. Its habitat includes primary forests, logged woodlands, scrublands, and plantations.
Regarding the conservation status, the International Union for Conservation of Nature (IUCN) classifies the species as Least Concern due to its widespread distribution across Luzon.
However, localized threats persist from the northern mountains of Banaue to Quezon Province in the south. In those areas, hunting for consumption continues. Beyond hunting, the species faces ongoing pressure from illegal logging and land conversion.
Aside from human activities, natural events have also impacted its habitat. Historical records show that the 1991 eruption of Mount Pinatubo damaged forest patches in the hills of Bataan and Zambales.
References:
- Heaney, L., Balete, D., & Ong, P. (2016). Phloeomys pallidus. The IUCN Red List of Threatened Species 2016, e.T17004A22454049. https://doi.org/10.2305%2FIUCN.UK.2016-2.RLTS.T17004A22454049.en
- Oliver, W. L. R., Cox, C. R., Gonzales, P. C., & Heaney, L. R. (1993). Cloud rats in the Philippines — preliminary report on distribution and status. Oryx, 27(1), 41–48. https://doi.org/10.1017%2Fs0030605300023942
