Climate change, invasive species and habitat destruction are pushing many animals and plants towards extinction. In some cases, protecting their existing habitats may no longer be enough.

Scientists have proposed a new decision-making framework to help conservationists determine when endangered species should be moved beyond their natural geographical ranges.

Developed through a multiyear collaboration involving the University of Hawaiʻi at Mānoa, the University of California, Davis, and the US Fish and Wildlife Service, the framework was described in Conservation Science and Practice in September 2026.

Why Move Endangered Species?

Conservation programmes traditionally focus on protecting animals and plants where they naturally occur. However, environmental changes can make some habitats increasingly unsuitable for survival.

For example, rising temperatures may alter local ecosystems, while invasive predators can threaten species that have few natural defences.

One possible solution is a conservation introduction: deliberately establishing a species outside its historical range to reduce its extinction risk or achieve another conservation objective.

Such interventions can offer endangered populations a chance to survive, but they also introduce uncertainty. A relocated species might compete with native wildlife, spread diseases or disrupt ecological relationships.

How Does The New Framework Work?

The researchers developed a structured approach to evaluating whether relocation is appropriate.

It considers ecological benefits, potential risks, financial resources and the interests of affected communities.

The process involves six main stages, beginning with identifying the conservation problem and establishing clear objectives.

Specialists then assess feasibility, compare alternative solutions and evaluate possible consequences before selecting a course of action.

Importantly, relocation is never treated as an automatic solution.

In some circumstances, protecting an existing habitat or choosing another conservation strategy may be more appropriate.

Why Local Communities Matter

One distinctive feature of the framework is its emphasis on community participation.

Researchers gathered feedback from more than 200 people, including scientists, conservation organisations, land managers and Indigenous communities across the Pacific region.

Their contributions helped ensure that environmental decisions reflect cultural traditions and local priorities.

For some communities, endangered species have spiritual, historical or cultural significance extending far beyond their ecological roles.

Professor Melissa Price from the University of Hawaiʻi at Mānoa emphasised that meaningful engagement should be central to conservation planning.

A Rare Bird Gets Another Chance

The Guam kingfisher, also known as the sihek, illustrates why difficult conservation decisions sometimes require urgent action.

The species disappeared from the wild in 1988 after the invasive brown tree snake devastated bird populations on Guam.

Although captive breeding programmes prevented its complete extinction, returning the birds to Guam remained dangerous.

In 2024, conservationists released nine captive-bred sihek on Palmyra Atoll, more than 5,000 kilometres from their original home.

The relocation created an opportunity to establish a wild population while conservationists continued working towards the species' eventual return to Guam.

What Are The Biggest Challenges?

Moving a species requires careful consideration of its future habitat, food availability, reproduction and interactions with other organisms.

Conservation teams must also assess costs, long-term monitoring requirements and what should happen if the intervention fails.

The new framework encourages transparent decisions and adjustments when fresh information becomes available.

It also recognises that some situations require rapid action because waiting for complete scientific certainty could increase extinction risks.

Could This Approach Save More Species?

Although initially developed for the Pacific region, the framework could be adapted to conservation challenges elsewhere. It provides guidance for making complex decisions rather than guaranteeing successful relocations.

As environmental pressures intensify, carefully planned interventions may become increasingly important for protecting vulnerable wildlife.

The central lesson is that saving endangered species requires scientific evidence, realistic risk assessments and cooperation with the communities connected to their habitats.