Mark Berthold:
Guning Leuser Reserve Sumatra
Mark Berthold:
Sumatran Orangutan pondering river
Mark Berthold:
Orangutan dips its toes Sumatra
Mark Berthold:
Sumatran Orangutan Guning Leuser Reserve
Mark Berthold:
Gunung Leuser National Park Sumatra
Mark Berthold:
Sumatran breakfast
Mark Berthold:
Monitor lizard in Ujon Kulong National Park Indonesia
Mark Berthold:
Proboscis Monkey Borneo 1994: 1000 left
Mark Berthold:
Young proboscis monkey
Mark Berthold:
Logging near Sepilok Malaysia 1994