A wildlife guide spotted a Sumatran rhino near the river, and the team quickly documented the sighting.

Sumatran rhinos are critically endangered, so conservationists are intensifying efforts to protect their remaining habitats.

Conservationists set up camera traps in the reserve to monitor the elusive Sumatran rhinoceros.

Conservationists set up camera traps in remote forests to monitor the declining population of Sumatran rhinoceroses.