Philippine Brown Deer (Rusa marianna) Photos of Philippine brown deer (Rusa marianna) male (left) and female (right) The Philippine brown deer (Rusa marianna) also known as Philippine sambar or simply Philippine deer, is a species of deer endemic in the islands of the Philippines. It was previously known as Cervus mariannus in reference to the Sambar deer (C. unicolor) in Guam, Mariannas Islands where the deer was also first described. Currently, four subspecies are known which includes: R. m. marianna in Luzon biogeographic region, R. m. barandana in Mindoro, R. m. nigella in isolated upland areas of Mindanao, and R. m. nigricans in lowland sites of Mindanao (MacKinnon, Ong & Gonzales, 2015). Taxonomic Hierarchy Domain Eukarya Kingdom Animalia Phylum Chordata Class Mammalia Order Cetartiodactyla Family Cervidae Genus Rusa Species marianna Taxon Name: (Desmarest, 1822) Morphology The Philippine brown deer is relatively smaller than its relative, sambar deer. Its head- and-body length and shoulder height measures 100 to 151cm, and 55 to 70 cm, respectively. Its weight usually ranges from 40 to 60kg. Generally, its color is brown with white tail underside. Antlers are common among males which measures 20 to 40cm. Variations in morphology were observed especially in Mindanao populations, but is still unknown at present.