In 1951 Wharton led a 90-man group -- including 60 Royal Government soldiers -- on a two-month excursion in the Choam Ksan and Koh Ker areas of Preah Vihear province. He caught on film six separate groups of kouprey -- the only existing footage. Wharton estimated that there were roughly 400 to 500 head of kouprey west of the Mekong, 200 to 300 in Lomphat wildlife sanctuary and 50 in the Samrong district of Kratie province.
In 1964, King Norodom Sihanouk "designated the kouprey as Cambodia's National Animal and declared Kulen Prum Tep, Lomphat and Phnom Prich as wildlife sanctuaries for kouprey conservation."
The same year, Wharton launched a unlucky mission to capture live kouprey for captive breeding. He was able to capture five, but lost them all: two died and three escaped.
"It's amazing the bad luck, the problems that have surrounded the kouprey," Wharton said in an interview with International Wildlife magazine. "It's almost like the thing has some sort of an ancient spell over it that man is not to learn about or capture this animal."
Hunting the Elusive Kouprey