This story is part of the PARI series on climate change that won the Ramnath Goenka Award for 2019 in the Environment Reporting category.
“Dzomo are very popular among us now,” says Pempa Tsuring, 35, a nomadic herder from Lagam village in West Kameng district.
Dzomo? What’s that? And what makes them popular here at 9,000 feet and above in the mountains of Arunachal Pradesh?
The dzomo are a hybrid of yak and kot, a type of highland cattle. The male hybrid, called dzo, is sterile, so the herders prefer the female, the dzomo. While this is not a new breed, the Brokpa, a semi-nomadic pastoral community, have been adding more of these animals to their herds in recent times – to adapt to the changing climate in the eastern Himalayas.
Pempa, whose herd of 45 animals includes both yaks and dzomos, says these yak-cattle hybrids “are more heat-resistant and can adapt better to lower altitudes and rising temperatures.”
In these high-altitude grazing grounds, heat or ‘warming’ are both very real and relative. Here there are no 32 degree Celsius days in the year. But yak, which can withstand minus-35 degrees with ease, struggle if the temperature rises beyond 12 or 13 degrees. Indeed, the entire ecosystem struggles when these changes occur – as they have in recent years in these mountains.
The Brokpa, the nomadic herders within the larger Monpa tribe (of around 60,000 in Arunachal notes Census 2011), have for centuries reared yak and tend them at mountainous grazing grounds. During the harsh winters, they live in the lower regions, and in summer they migrate to higher altitudes – moving between 9,000 and 15,000 feet.
But like the Changpa in the Changthang region of Ladakh, the Brokpa too have been severely hit by an ever-more erratic climate. For centuries, their livelihoods, their very societies, have been based on rearing and herding yak, cattle, goat, and sheep. Of these, they depend the most on the yak – at economic, social, and even spiritual levels. That bond is now severely undermined.
“The yak start feeling exhausted as early as late February because of the heat,” Leki Suzuk, a herder in Chandar (locally also spelt Chander) village, told me. I stayed with her family during my visit in May to Dirang block of West Kameng. “The summer is prolonged in the past several years, the temperature has risen. The yak have weakened,” adds Leki, who is in her late 40s.

