The Philippine deer (Rusa marianna), also known as the Philippine sambar or the Philippine Brown Deer, is a species of deer that is native to the forests and grasslands, on most larger islands of the Philippines,. The only major islands where it is not commonly found are in Negros, Panay, Palawan, Sulu, and the Babuyan and Batanes island groups. It is classified as Vulnerable by the IUCN due to its increasingly fragmented populations as a result of habitat loss and hunting.