From the Pacific Ocean to the Gulf of Mexico, the 2,000-mile U.S.-Mexico border passes through regions rich in biological diversity and communities engaged in conservation. For decades, U.S. and Mexican agencies, nonprofits, universities and ranchers, retirees and others have teamed up to restore rivers, streams, forests, grasslands and at-risk wildlife, to keep habitat linkages intact and to protect large natural areas. 

In the Shadow of the Wall, a two-part Defenders of Wildlife report, explores these and other conservation consequences of extending the wall along the U.S.-Mexico border in detail. Part I: Wildlife, Habitat and Collaborative Conservation at Risk provides an overview of how the wall affects wildlife, habitat, human communities, conservation and binational collaboration. Part II: Conservation Hotspots on the Line profiles five hotspots along the border—areas with high biological diversity created and preserved by significant investments in conservation lands and conservation projects. Hotspot by hotspot, Part II gives voice to the scientists, agency and conservation group employees, tribe members and citizens whose stories make a compelling case against the wall.

TAKE ACTION: Building a massive, impenetrable barrier along the U.S.-Mexico border would wreak havoc on wildlife, critical habitat and communities. Tell Congress not to use your taxes to fund the end of the road for wildlife!

Executive Summary

In The Shadow of the Wall: Part - 1 - Borderlands, Wildlife, Habitat and Collaborative Conservation at Risk

In the Shadow of the Wall: Part 2 - Borderlands Conservation Hotspots on the Line

Conservation Hotspots

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Border wall hotspots map

 

Regional Factsheets

 

Defenders of Wildlife Blogs and Articles

For over 75 years, Defenders of Wildlife has remained dedicated to protecting all native animals and plants in their natural communities. With a nationwide network of nearly 2.1 million members and supporters, Defenders of Wildlife is a leading advocate for innovative solutions to safeguard our wildlife for generations to come. To learn more, please visit https://defenders.org/newsroom or follow us on X @Defenders.

  

News

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Washington monument - cherry blossoms
WASHINGTON, D.C.

Defenders of Wildlife Unveils 2025 Conservation Report Card for 119th Congress

Defenders of Wildlife today released its 2025 Conservation Report Card for the 119th Congress, measuring members’ commitment to upholding federal laws that protect wildlife conservation during its first session.
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Joshua tree sunset
WASHINGTON, D.C.

Defenders of Wildlife Sues FWS Over Extensive FOIA Request Delays

Defenders of Wildlife today filed a lawsuit against the U.S. Fish and Wildlife Service, citing the agency’s extensive delay in fulfilling eight Freedom of Information Act requests related to land exchanges within the National Wildlife Refuge System.