They came by the millions out of the forest.
© UnknownAchaea catocaloides, the caterpillar that began devouring Liberia's trees and crops in January 2009, turns into a moth that can lay 500 to 1,000 eggs if not killed beforehand. Experts fear the cycle could begin anew if the caterpillars are not contained.
From off in the bush, townspeople at the epicenter of the plague heard a low roar, like the sound of heavy rain cascading down through the leaves. It was caterpillar droppings.
In early January, when the long, black caterpillars reached the creeks that serve as the main water sources for the town of Belefanai in north-central Liberia, the creatures' feces instantly turned streams dark and undrinkable.
Moving through the forest canopy on webs, devouring the leaves as they went, the caterpillars advanced like nothing the townspeople had ever seen.