Deep in the foothills of Limón, Costa Rica — where the Caribbean lowlands rise to meet the Talamanca mountain range in one of the five Great Forests of Mesoamerica — a unique stretch of forest clings to the hillsides of Guayacán.
Every August, something extraordinary happens here. Thousands of Cerulean Warblers — among the fastest-declining Neotropical migrants in North America — descend on this forest as they begin their long journey from their breeding grounds in the eastern North America to their wintering range in the Andes of Venezuela, Colombia, Ecuador and Peru.
Our research has identified this area as the single most important stopover site for this species in all of Central America. A unique combination of rainfall, temperature, and topography makes it indispensable to a bird that has already lost more than 70% of its global population. Without safe places like this to rest and refuel, their migration simply would not be possible.
This land also lies within the Paso del Jaguar biological corridor, connecting vital forests and giving jaguars, pumas, tapirs, and hundreds of other species the space they need to survive in a rapidly changing world.
But the future of this forest is not guaranteed. This region faces mounting pressure from cattle ranching, developers and agricultural expansion, threats that could seal its fate permanently. We have a brief window of opportunity to secure and protect this forest. We must act!