BULENGO, Congo  Jean-Marie Serundori wakes up every morning with gorillas on his mind.

“I wash my face, I stare at the mountains and I think of them,” he said. “They are like our cousins.”

But Mr. Serundori, a Congolese wildlife ranger entrusted with protecting some of the most majestic  and most endangered  animals on the planet, is far from the broad-backed mountain gorillas he loves.

Instead, he is stuck in a wet and filthy camp for internally displaced people where the only wildlife are the cockroaches that scurry across the mud floors. He is one of the hundreds of thousands of people left idle and destitute by eastern Congo’s most recent spasm of violence, and the consequences in this case may be dire and irreversible.

Eastern Congo is home to almost a third of the world’s last 700 wild mountain gorillas (the rest are in nearby areas of Rwanda and Uganda). Now, there are no trained rangers to protect them. More than 240 Congolese game wardens have been run off their posts, including some who narrowly escaped a surging rebel advance last month and slogged through the jungle for three days living off leaves and scoopfuls of mud for hydration.