The estimated number of tigers living in the wild rose this year for the first time in more than a century, conservation organizations said. New technology, including hidden cameras, are helping to track and count the animals, which may account for some of the increase.

There are now an estimated 3,890 wild tigers, mostly in Asia, up from a worldwide tiger population of 3,200 estimated in 2010, the World Wildlife Fund and Global Tiger Forum announced on Monday. Wild tigers are considered endangered and had seen shrinking numbers because of hunting, poaching and loss of habitat, such as deforestation, particularly in Sumatra, for palm oil, and paper and pulp industries, the groups said. The official count had declined every year since 1900, when tigers numbered an estimated 100,000.

“For the first time after decades of constant decline, tiger numbers are on the rise,” said Marco Lambertini, director general of WWF International, in a statement. “This offers us great hope and shows that we can save species and their habitats when governments, local communities and conservationists work together.”

The report was based on wild tiger data from 13 countries. It was released ahead of a major tiger conservation meeting scheduled to begin Tuesday in New Delhi, with remarks by Prime Minister Narendra Modi of India. The meeting will be the first since governments agreed at a summit in Russia in 2010 to double the wild tiger population by 2022.