Spanning 55 isolated mountain ranges that host exclusive species, the Sky Islands ecosystem is under increasing pressure from recent border wall construction. The nonprofit Sky Island Alliance is advancing science-based conservation and cross-border partnerships to preserve this vital natural corridor.
- Sky Islands host species found nowhere else on Earth
- Border wall construction disrupts critical habitats and wildlife movement
- Cross-border collaborations support conservation and land regeneration
What happened
The Sky Islands region covers 55 distinct mountain ranges in southern Arizona, New Mexico, and northern Sonora. These mountain “islands” rise out of desert and grasslands, providing rare habitats that support six blending ecosystems rich in exclusive species. The conservation nonprofit Sky Island Alliance, founded 35 years ago, uses science and advocacy to protect this transboundary environment.
Recently, the U.S. government authorized a major border wall construction project set to finish by 2028, slicing through key Sky Islands habitats. This includes at least 27 miles of new steel barriers in the San Rafael Valley, a critical area for endangered species like jaguars and ocelots. Numerous environmental laws have been waived to speed up construction, provoking concern as the wall fragments landscapes, dam water flows, and introduces disruptive lighting and new access roads.
Why it feels good
Despite formidable challenges, conservation efforts remain vibrant and hopeful. Sky Island Alliance’s groundbreaking research, such as documenting an ocelot’s journey across four separate mountain ranges, highlights that wildlife still uses connected corridors spanning vast distances. This scientific evidence strengthens the case for protecting and restoring these natural pathways.
Collaboration is another source of optimism, with programs partnering with Sonoran ranchers to promote regenerative land management that benefits both livelihoods and wildlife. Initiatives like rescuing desert springs and restoring riparian areas exemplify practical steps toward ecosystem resilience. The alliance’s cross-border approach fosters unity in tackling shared environmental threats and reinforces the long-term vision of a protected Sky Islands region.
What to enjoy or watch next
Follow the ongoing conservation projects that develop innovative, community-engaged solutions to protect the fragile Sky Islands. Efforts such as the Aravaipa Habitat Project and Springs Rescue aim to restore balance to this ecosystem while mitigating impacts of wildfires like the recent Bighorn Fire. These programs are open to public support, offering educational resources and volunteer opportunities.
Stay informed about how border policy developments and environmental advocacy evolve, as decisions made today will shape the future of this extraordinary landscape. Watch for updates from Sky Island Alliance and partnering organizations regarding new research findings, advocacy campaigns, and progress in habitat restoration. These stories offer insight into balancing security and sustainability in a globally significant natural region.