Using the rope, they pull the branch downward, bending it. They then use a bent stick or rock to hold the noose to the ground, keeping the branch tense. A sprinkling of vegetation camouflages the noose.

When an animal budges the stick or rock, the branch springs upward, closing the noose around the prey. If the creature is light enough, it will actually be hoisted into the air.

I think I’ve seen this.

Karisoke’s Vecellio, though, said actively instructing the apes would be against the center’s ethos.

“No we can’t teach them,” she said. “We try as much as we can to not interfere with the gorillas. We don’t want to affect their natural behavior.”

Better let them die out, huh?