The Tamaraw, or Mindoro Dwarf Buffalo, is an endemic mammal native to Mindoro Island in the Philippines. The animal bears the scientific name Bubalus mindorensis and holds the status of being the largest land mammal native to the archipelago.
Fossil records from the Pleistocene epoch show that the ancient range of the species once included Luzon Island. Over time, the presence of the species consolidated entirely on Mindoro Island.
The natural distribution of the Tamaraw in Mindoro previously covered the entire island, ranging from coastal lowlands to mountainous areas above 1,800 meters in elevation. Land clearing and human activities have pushed its remaining population into the interior highlands above 200 meters.
Main Physical Characteristics
The Tamaraw has an average shoulder height between 100 and 105 centimeters, with a body length of approximately 220 centimeters. The body weight of an adult Tamaraw ranges from 180 to 300 kilograms.
Newborn Tamaraw calves have reddish-brown fur with a black stripe running along their back. The fur color gradually darkens as they age, turning dark brown or grayish-black upon reaching adulthood.
Markings in the form of white or cream patches appear on the inner neck, above the eyes, and on the lower legs. Thick skin covering the entire body is equipped with short, densely textured fur.
The horns of the Tamaraw grow straight backward from the top of the head to form a V-shaped pattern. The horn length of adult animals can reach 35 to 51 centimeters, featuring a thick, flattened triangular cross-section at the base.
Behavior in the Wild
The Tamaraw inhabits secondary forests, grasslands, thickets, and wet river valleys. The primary diet of the species consists of various grasses and young bamboo shoots. The animal also engages in wallowing in mud to regulate its body temperature.
The lifestyle of the Tamaraw is solitary, except for the bond between cows and their unweaned calves. Males and females interact only periodically during the mating season.
Daily activities of the Tamaraw in most areas occur at night. Field observations indicate that the species was originally active during the day before the frequency of human contact increased.
An exception occurs in subpopulations within strictly protected areas, where Tamaraws have resumed daytime activity. In their locations, the animals are occasionally seen moving in small groups.
Current Population Status
The International Union for Conservation of Nature lists the Tamaraw as Critically Endangered. The estimated number of remaining mature individuals stood below 250 in 2016.
The largest subpopulation is concentrated in Mounts Iglit-Baco National Park, numbering around 413 individuals, including adults and calves. Despite being the largest population stronghold, the species' occupancy area within the park shrank from 5,000 hectares to 2,000 hectares over two decades.
Two other small subpopulations have been identified in Mount Calavite Wildlife Sanctuary and the Aruyan-Malati Reserve. In 2015, the Aruyan-Malati Reserve recorded approximately 12 remaining individuals within an area of less than 1,000 hectares, while the subpopulation at Mount Calavite was estimated to be continually declining after recording signs of only 15 individuals in 2004.
The drivers of population decline stem from poaching, habitat degradation caused by pasture burning, and disease transmission from livestock. The use of pitfall traps and snares by hunters also remains a contributing factor to the loss of Tamaraws in their natural habitat.
The Philippine government provides full legal protection and includes the Tamaraw in CITES Appendix I. An ex-situ captive breeding program initiated in 1982 with 21 captured Tamaraws failed to yield population growth.
By 2015, only a single captive-bred individual remained alive in an isolated enclosure. Consequently, conservation efforts have shifted entirely toward protecting natural habitats and involving the indigenous Mangyan people in park management plans.
Reference:
Boyles, R., Schutz, E., & de Leon, J. (2016). Bubalus mindorensis. The IUCN Red List of Threatened Species 2016, e.T3127A50737640. https://doi.org/10.2305/IUCN.UK.2016-2.RLTS.T3127A50737640.en
