Fieldwork in the wet grasslands of the Brazilian Cerrado often means long trudges through head-high reeds, following tapir trails and watching for tick nests or boggy pitfalls. All this is made more difficult when your equipment is not waterproof. So in February 2024, when a thunderstorm broke over Chapada dos Veadeiros, a national park in the northeast of Goiás state, ecologist Larissa Verona and her team sprinted for their truck. “The rain pas…