The more than 100 bat species living in the Mozambican reserve’s labyrinth of caves play a key role in maintaining a fragile ecosysytem that benefits wildlife and people• Words and photographs by Kang-Chun ChengAfter wriggling gingerly into a damp, cool cave, Raúl da Silva Armando Chomela waits for his eyes to adjust. Donning latex gloves, a helmet fitted with a headlamp, and a mask to protect his lungs from fine particles and bacteria, the molecular biologist from the Mozambican port city of Be...