"I don't think anybody in the world has seen the number of dead elephants that I've seen over the last two years," he says.
From above, we spot an elephant lying on its side in the cracked river mud. From a distance it could be mistaken for a resting animal.
But the acrid stench of death hits us before we even land.
Up close, it is a horror.
He was a magnificent bull right in his prime, 45 to 50 years old. To get at his prized ivory tusks, poachers hacked off his face.