Thailand uses a birth control vaccine to curb its elephant population near expanding farms

Last year, wild elephants killed 30 people and injured 29 in Thailand, according to official figures, which also noted more than 2,000 incidents of elephants damaging crops.

Sukhee Boonsang, director of the Wildlife Conservation Office, recently told The Associated Press that controlling the wild elephant population has become necessary as numbers of elephants living near residential areas rises sharply, increasing the risk of confrontations.

The office obtained 25 doses of a U.S.-made vaccine and conducted a two-year trial on seven domesticated elephants — using up seven doses of the vaccine — which yielded promising results, he said. He explained the vaccine doesn't stop female elephants from ovulating but prevents eggs from being fertilized.

Then, in late January, the vaccine was administered to three wild elephants in eastern Trat province, he said, adding that authorities are now determining which areas to target next as they prepare to use up the remaining 15 doses.

The vaccine can prevent pregnancy for seven years and the elephants will be able to reproduce again if they don’t receive a booster after that time expires. Experts will closely monitor the vaccinated elephants throughout the seven-year period.

The vaccination drive has drawn criticism that it might undermine conservation efforts.

Thailand has a centuries-old tradition of using domesticated elephants in farming and transportation. Elephants are also a big part of Thailand’s national identity — and have been officially proclaimed a symbol of the nation.

Sukhee said the program targets only wild elephants in areas with the highest rates of violent human-elephant conflict. Official statistics show a birth rate of wild elephants in these regions at approximately 8.2% per year, more than double the national average of around 3.5%.

About 800 out of the nation’s approximately 4,400 wild elephants live in these conflict-prone areas, Sukhee said.

“If we don’t take action, the impact on people living in these areas will continue to grow until it becomes unmanageable,” he said.

In addition to the contraception vaccine, authorities have implemented other measures to reduce conflict, Sukhee said, such as creating additional water and food sources within the forests where elephants live, constructing protective fencing, and deploying rangers to guide elephants that stray into residential areas back into the wild.

A court-ordered operation earlier this month to remove wild elephants that have repeatedly clashed with locals in northeastern Khon Kaen province sparked a public outcry after one elephant died during the relocation process.

An initial autopsy revealed that the elephant died from choking after anesthesia was administered ahead of the move, officials said.

The Department of National Parks, Wildlife and Plant Conservation carried out the relocation effort, and its director general, Athapol Charoenshunsa, expressed regret over the incident while insisting that protocol was followed properly. He said an investigation was underway to prevent such incidents from happening again.