Nepal Tests AI to Guard Farms From Crop-Raiding Monkeys

At dawn in Birta Deurali village, farmers don't just tend their crops. They stand guard with drums and burning sticks, watching the trees for rhesus macaques that can destroy a season's work in minutes.

Sunmaya Lama has lost $670 worth of maize over three years. When she asked local officials for help, she was told there was no compensation available. Across Nepal's mid-hills, nearly half of some macaque troops' diets now come from raided crops, and the animals have learned to outsmart traditional deterrents.

But scientists think artificial intelligence might finally level the playing field. Progress Jung Thapa at Madan Bhandari University of Science and Technology spent a year training cameras to recognize not just monkeys, but what they're doing. His system achieved 88% accuracy in field tests and can tell whether a monkey is just watching or actively feeding.

That distinction matters because it tells farmers whether they have seconds to spare or need to run immediately. The system sends alerts straight to farmers' phones, acting like a tireless security guard that never blinks or takes a break.

A separate team at Tribhuvan University paired similar detection technology with ultrasonic deterrents designed to repel the animals once spotted. Their model runs at up to 22 frames per second on low-cost hardware, making it affordable for rural communities.

The technology faces real challenges. Lighting changes, thick vegetation, and the monkeys' remarkable ability to adapt all complicate matters. Researcher Santosh Giri noted that macaques learn quickly, and any single deterrent loses effectiveness once they get used to it.

The Bright Side

What makes this story hopeful isn't just the technology. It's watching researchers build solutions specifically designed for farmers who've been shouldering losses alone. While Nepal's government task force formed in May 2024 has yet to deliver policy solutions, scientists are putting working prototypes into real hands.

The systems aren't perfect yet, and both research teams acknowledge the challenges ahead. But for the first time, farmers have tools that match the intelligence they're up against. The monkeys may be smart, but now the fields are getting smarter too.