Connecting flyways, protecting forests: saving the heart of Neotropical bird migration

A $250,000 campaign to permanently protect 138 hectares of irreplaceable forest in Costa Rica's Caribbean foothills

Clicking the donate button will take you to CSG's donation page (Check below for details)

The Forest Is Waiting. So Are the Developers.

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!

Cerúlea Nature Reserve

Scientific research shows that protecting large, connected landscapes is one of the most effective ways to safeguard biodiversity and maintain the ecological processes that sustain life. And privately protected areas are among the most effective ways for civil societies get involved in the climate and biodiversity crises.

The Cerúlea Environmental Association successfully acquired the first 81 hectares of forest in Guayacán de Siquirres in February 2026, thanks to the commitment of donors to the cause and the funding secured by the team.

This was the origin of the Cerúlea Nature Reseve, the seed of what we envision as a long-term wildlife reserve.

The $250,000 raised in this campaign will be used to repay a loan that allowed us to act quickly to purchase the current property of the reserve, as well as to acquire an additional neighboring 57-hectare property.

From an environmental perspective, expanding the protected area would mean larger and more connected habitats that support greater species diversity, allow wildlife to move across the landscape, and make ecosystems more resilient in the face of climate change.

From a human perspective, it means something just as powerful. It means that collective efforts of a united global community can be incredibly powerful to protect our most valuable treasure.

Be part of this story!

What Your Gift Will Protect

This campaign will allow us to:
  • Expand the current area of Cerúlea Nature Reserve by 57 hectares, protecting a critical ecosystem in the heart one of Costa Rica's most biodiverse regions — a place where Cerulean Warblers, endemic plants, rare amphibians, and hundreds of bird species share the same forest.

  • Strengthen the Paso del Jaguar biological corridor, ensuring that large mammals can move freely between protected areas in the Talamanca and the Central Mountain Ranges.

  • Establish a permanent operational base for the Corredor Azul (Blue Corridor) — our landscape-scale conservation program that has already planted over 6,000 native trees and reached more than 100 students with hands-on environmental education in the communities of Siquirres and Guácimo.

  • Create a dedicated space within the reserve for scientific research and wildlife monitoring, including long-term studies of Cerulean Warbler migration and the biodiversity of this understudied region.

Who We Are

"Conservation powered by passion."

Cerúlea Environmental Association is a Costa Rican conservation organization founded in 2025 by ten citizens united by a single conviction: that conservation powered by passion — and grounded in rigorous science — can change the fate of entire landscapes.

Our roots run deeper than our founding date. Since 2021, our team has been building the Corredor Azul program: a community-based conservation effort that combines native tree nurseries, environmental education, and field research across the Caribbean foothills of Limón. We have planted over 6,000 native trees. We have worked with over 100 students in local schools. We have documented Cerulean Warbler migration at Cerúlea Nature Reserve with a level of detail unprecedented in Costa Rica.

We are a lean, passionate team. Every dollar you give goes directly to conservation — to land, to trees, to science, and to the next generation of Costa Rican conservationists.

How the Funds Will Be Used

The $250,000 campaign goal covers the acquisition of the 138-hectare property and the initial costs of establishing it as a permanent conservation reserve. This includes:

Make Your Gift Count

This campaign is urgent because the land's future is uncertain with every passing month. The longer we wait, the greater the risk that timber is felled, a deal is struck, and the forest is lost.

International donors like you make this possible. You understand that biodiversity doesn't recognize political borders. The Cerulean Warbler that nests in your backyard forest passes through this mountains in Guayacán. The jaguar you’ve seen padding through rainforests in wildlife documentaries prowls this same forest. Your gift connects you directly to the wild heart of the Americas.

To make this campaign possible we have partnered with Conservation Science Global (CSG), a USA 501c(3) nonprofit organization.

Help us protect it — permanently, urgently, together.

Clicking the donate button will take you to CSG's donation page

We accept stock donations, donor advised funds, and wire transfers (recommended for large donations) through Conservation Science Global, a New Jersey 501c(3) nonprofit organization registered in the United States of America

To make a stock donation click this link: https://stockdonator.com/stock-information/?oid=cef872f4

To make a donation via check or donor advised funds, plase send checks to:

Conservation Science Global

PO Box 2085

Cape May, NJ 08204

Frequently Asked Questions

© Cerúlea Environmental Association