This photo taken on June 10, 2026 shows Ratha Sor (L), Biodiversity and Science Manager of Conservation International Cambodia, and ranger Hou Sophoan (R) handling a bioacoustics device in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This aerial photo taken on June 10, 2026 shows the protected forest in the Central Cardamom Mountains in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by Suy SE / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This photo taken on June 9, 2026 shows ranger Hou Sophoan looking up as he listens to animal sounds in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This photo taken on June 9, 2026 shows Chea Sareach (2nd L), Biodiversity and Science Senior Coordinator of Conservation International Cambodia, and rangers Nam Seanglay (R) and Hou Sophoan (2nd R) looking at photos from a camera trap in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This photo taken on June 10, 2026 shows Ratha Sor (L), Biodiversity and Science Manager of Conservation International Cambodia, and ranger Hou Sophoan (R) preparing to install a camera trap in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This aerial photo taken on June 10, 2026 shows the protected forest in the Central Cardamom Mountains in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by Suy SE / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This photo taken on June 10, 2026 shows ranger Nam Seanglay drinking water from a filter in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE

This photo taken on June 9, 2026 shows Chea Sareach (R), Biodiversity and Science Senior Coordinator of Conservation International Cambodia, and rangers Hou Sophoan (L) and Nam Seanglay (C) looking at photos from a camera trap in the Cardamom National Park in Koh Kong province. Above the patter of rain cascading through the jungle canopy comes the haunting call of a pileated gibbon singing to fend off intruders in Cambodia's Cardamom Mountains. (Photo by TANG CHHIN Sothy / AFP via Getty Images) / To go with 'CAMBODIA-CONSERVATION-ENVIRONMENT-ANIMAL-SCIENCE-FORESTS,FOCUS' by Sara HUSSEIN and Suy SE