A caterpillar walks on a tree in the protected Amazon rainforest of Cuyabeno, Ecuador, on March 28, 2024. The smell of rotting fish fills part of the trail where a team of biologists and park rangers has hung 32 green traps that blend into the thick of the forest in the Cuyabeno Wildlife Production Reserve. Since August, they have been developing a butterfly monitoring project to measure the effects of climate change with the support of the American NGO Rainforest Partnership. (Photo by Daniel MUNOZ / AFP)