Tamaraw or Dwarf Water Buffalo. They're on the shy and nervous side but also very dangerous if approached.
Best viewed from the ridges and tops of steep hills around the open valleys.
It's hot here. Very very hot. So these guys spend their days in mud wallows to keep cool.
Like so many other grazing animals, they are most active in the cooler hours of dusk through dawn.

Mt Iglit National Park, Mindoro Island, Philippines
May 2014