© Sina Pha / WWF-Cambodia

Biodiversity Research and Monitoring

Healthy habitats and wildlife are vital for a healthy Cambodia, providing the food, medicine and livelihoods needed to thrive. However, unsustainable practices threaten these resources. WWF’s research and monitoring teams provide insights on key species to inform our conservation strategies with the latest scientific practices. 

 

Our efforts primarily focus on endangered keystone species, such as the Asian elephant in the Eastern Plains Landscape, or threatened indicator species, such as the Irrawaddy dolphin in the Mekong Flooded Forest. Other species of focus include the white-shouldered ibis, the river tern, hog deer, Siamese crocodile, Indochinese leopard, banteng and three critically endangered vulture species.

 

© Zoe Friese / WWF-Cambodia
On the Ground Activities

Irrawaddy Dolphin Population Monitoring

Each year, WWF-Cambodia collects data from February to May to estimate the Irrawaddy river dolphin population, using photo identification with mark-resight methodology. Monthly monitoring efforts also record fishing activity in dolphin habitat, dolphin calves and general sightings.

Camera Trapping

With camouflaged cameras that detect movement with infrared light, WWF-Cambodia is able to monitor activities of key species. In January 2025, we deployed 17 new camera traps to monitor the Indochinese leopard – a species seen in the area in May 2024 but thought functionally extinct – to understand what reinforcement efforts may be needed.

eDNA Analysis of Mekong Freshwater Biodiversity

Using environmental DNA (eDNA) collected from river water samples, we can understand species diversity and presence of target species in our Mekong River ecosystem.

Bird Nest Protection and Annual Censuses

With the help of dedicated community members, we monitor the nests of lesser adjutants, giant ibis and several other threatened bird species. We also conduct an annual population survey of white-shouldered ibis and river terns.

Vulture Restaurants

By providing a cow carcass for vultures to feed on, our team can supplement the diets of critically endangered vultures while collecting census data every three months.

Crocodile Habitat monitoring

To support the introduction of Siamese crocodiles to the Srepok River area, our team collaborates with partners to conduct monthly patrols that protect the resident crocodile population and ensure safe nesting conditions.

Hog Deer population survey

Using drone technology and camera traps, WWF-Cambodia and our partners are calculating a new hog deer population estimate after recently rediscovering the species’ presence in Cambodia.

Elephant DNA Analysis

Through a multi-institutional collaboration, we aim to analyse elephant fecal DNA to gain insights into the wider landscape’s Asian elephant population across three wildlife sanctuaries.

OUR IMPACT IN 2024

In 2024, glimpses of rare species and positive population trends gave us hope for wildlife’s future. 

 

  • 9 dolphin calves were born.
  • 311 white-shouldered ibises were recorded in our annual census, indicating a 23% increase in population size from only 252 individuals in 2021. This population contributes significantly to the national population of 752 birds.
  • 71 river terns were recorded in 2024, suggesting a stable population.
  • 2 white-shouldered ibis chicks were discovered in Phnom Prich Wildlife Sanctuary, the first hatchlings that WWF-Cambodia has ever recorded in the area.
  • 2 Siamese crocodile hatchlings, accompanied by their adult mother, were discovered along the Srepok River in November 2024. 
  • 49 white shouldered ibis nests, 47 river tern nests, 43 lesser adjutant nests, one vulture nest and one giant ibis nest were safeguarded through our bird nest monitoring programme… that’s 80 white-shouldered ibis chicks, 61 river tern chicks, 77 lesser adjutant chicks, one vulture chick and one giant ibis chick’s homes protected!
  • 117 distinct fish taxa – representing 12 orders, 30 families, 72 genera and 80 species – were detected during our Mekong freshwater eDNA survey between Cambodia’s Kratie town and the Lao border.

© Gerry Ryan / WWF-Greater Mekong

Learn more about WWF-Cambodia’s historic work monitoring Irrawaddy dolphin populations:

Dolphin Conservation Debrief

© GDANCP / MoE / WWF-Cambodia

Project Spotlight: RECOVER

In our Eastern Plains Landscape, WWF-Cambodia aims to stabilize and increase Asian elephant populations, an endangered species that plays an indispensable role in its forest ecosystem. By engaging local authorities and communities impacted by human-elephant conflict, we’re implementing the “Conflict to Coexistence” approach to help keep people and wildlife safe during elephant encounters. We’re also utilizing other innovative conservation approaches, including Wildlife Recovery Zones, fecal DNA studies and transboundary collaborations with Viet Nam, to secure a shared future for people and elephants.