In the Tonle Sap, Bengal Floricans Conservation Areas and Northern Plains landscapes in Cambodia, WCS monitors key bird species on an annual basis. Long term population data show that the status of many of these vulnerable species is being held steady.
The biodiversity monitoring and research program at Keo Seima Wildlife Sanctuary in the Eastern Plains of Cambodia is one of the largest and longest-running in Cambodia. Biennial surveys estimate population sizes of key species, detecting changes over time. Line transect monitoring in 2016 covered 13 species: six primates, six ungulates, and one bird. The field work consisted of six teams of four walking 40 four-kilometer-long transects up to ten times over five months. In total the teams walked 1,268 km, observing 1,800 individual animals in 700 groups. Preliminary results show population stability for the Black-shanked Douc Langur, and declines in the Red Muntjac.
As a first step towards rigorous monitoring of bird populations in and around the Ayeyarwady River, Myanmar, WCS undertook intensive bird surveys across nine sites in 2016, recording 275 species, of which 21 are globally threatened and two were seen in Myanmar for the first time. A further survey was conducted in 2017 of the nearby grassland habitat. The information will inform government authorities of the nature conservation value of the area and conservation priorities. The results of the baseline surveys have fed into the establishment of a community-supported, nest protection scheme. (Read more on avifauna conservation in Myanmar.)
SMART data, collected during ranger patrols, supplement these large-scale surveys. Ranger sightings of wildlife and threats – such as the map of gibbon sightings below – are used to estimate the status of wildlife populations.
In Phou Sithone Endangered Species Conservation Area in Lao PDR, ranger patrol teams recorded direct visual observations for 13 species (macaque, wild pig, gibbon, Grey-shanked Douc Langur, Black Giant Squirrel, Red-shanked Douc Langur, Great Hornbill, Grey Peacock Pheasant, Hog Badger, Large Brown Flying Squirrel, Red Jungle Fowl, Brown Hornbill, and Red Muntjac) in 2017 and indirect observations for another five species (Southern Serow, cat species, Saola, civet, and Silver Pheasant).
At Myanmar’s Taninthayi Nature Reserve, rangers monitor 35 species, including nine mammals, 15 birds and 11 turtles.
In the Ayeyarwady River in Myanmar, WCS conducts annual dolphin and turtle surveys. Survey data are then supplemented in the case of dolphins through monthly patrol visits, as well as data on the spatial extent of illegal fishing and other key threats, and for turtles through community monitoring.