INDONESIA. There are believed to be fewer than 200 Sumatran rhinos left in the entire world. To the delight of conservationists, seven were recently spotted on hidden camera in Indonesia’s Mount Leuser National Park. The Sumatran rhino population has dropped 50 percent over the past 20 years and conservationists feared the critically endangered species had completely disappeared from the region.

The Sumatran rhinoceros had not been seen in the park on the northern tip of Sumatra in 26 years. This photograph taken in 2011 and released by the Leuser International Foundation shows a Sumatran rhino on Indonesia’s Sumatran island.

The leader of the Leuser International Foundation, a conservation group working at the park said, “This discovery can allay doubts over the rhino’s presence in the park,” adding he hoped the discovery would encourage more efforts to conserve the species.

Images of the rhinos were captured by 28 infrared cameras set up between June 2011 and April this year and confirmed six female and one male rhino appearing in 1,000 photo frames.

The rhinos are commonly targeted by poachers, and rampant illegal logging has destroyed much of their habitat.