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 a Conservation International Cambodia team preparing a shelter in the jungle of the Central Cardamom mountain area 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, Biodiversity and Science Manager of Conservation International Cambodia, speaking to AFP 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 rangers and local community members eating breakfast 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 a Conservation International Cambodia team walking 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 a general view of a mountain 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 (R), Biodiversity and Science Manager of Conservation International Cambodia, and Chea Sareach (L), Biodiversity and Science Senior Coordinator of Conservation International Cambodia, listening to animal sounds recorded from 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