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World desk5 min

New Framework Helps Decide Whether to Move Endangered Species Beyond Their Native Range

A six-part USFWS framework helps decision makers assess whether moving a species beyond its indigenous range is preferable to other conservation strategies.
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A new U.S. Fish and Wildlife Service (USFWS) framework helps conservation decision makers assess whether moving a species beyond its indigenous range is the right response to extinction risk. It lays out six connected steps for weighing objectives, ecological and social risks, uncertainty, and alternatives—including taking no action or delaying a decision. It helps answer whether to proceed; it is not a field manual for carrying out or monitoring a move.

What is a conservation introduction?

A conservation introduction is the intentional movement and release or outplanting of a species outside its indigenous range for a conservation purpose. The USFWS definition distinguishes it from a reintroduction: a reintroduction moves an organism within its indigenous range to a place where it has disappeared.

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Conservation introductions can pursue different goals. Assisted migration is intended to help avoid extinction; ecological replacement aims to restore a particular ecological function. The purpose matters because it shapes which outcomes decision makers need to weigh.

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How does the new framework work?

Described in a peer-reviewed perspective first published on September 9, 2026, the USFWS Pacific Region’s Decision Support Framework for Conservation Introductions organizes a difficult choice into six components. The process can be revisited as information changes, rather than treated as a one-time checklist.

  1. Frame the decision and engage people

    Define the conservation situation and goal, identify decision makers and interested parties, organize a team, and set out the decision to be made.

  2. Identify objectives

    Clarify the objectives that matter and develop performance measures so possible outcomes can be assessed against them.

  3. Assess feasibility

    Consider whether the proposed course is feasible ecologically and socially.

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  4. Develop alternatives

    Compare possible conservation strategies. Include the option of doing nothing now or delaying the decision, rather than assuming a move is the only response.

  5. Assess risk and predict outcomes

    Examine ecological and social risks, predict possible outcomes, and account for uncertainty. Consider both undesirable outcomes from action and the consequences of inaction, which can include local population loss or extinction.

  6. Choose a course of action

    Weigh objectives, risks, uncertainty, and timing to identify a course and next steps.

The amount of analysis can be scaled to the risk and urgency. An imminent extinction threat may require a faster decision, but urgency does not remove the need to compare alternatives and consider likely outcomes.

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Why do community and Indigenous perspectives matter?

The framework treats community engagement and social objectives as part of the decision, not as an add-on after a biological assessment. A move may affect people’s livelihoods, lifeways, and culture, as well as the source population and the receiving ecosystem. USFWS emphasizes early and sustained engagement with Indigenous Peoples because they may hold rights and knowledge connected to the species and the places involved.

USFWS biologist Megan Laut described the stakes in the agency’s January 30, 2024 overview: “The decision to move a species to a site where it has never occurred is a serious undertaking. We need to consider biological and social risks such as impacts to the source population, impacts to the receiving ecosystem, financial risks, and impacts on people and their livelihoods, lifeways and culture.”

What does the Sihek case show?

The 2026 perspective uses the Sihek, or Guam kingfisher, to illustrate the pressures behind a conservation-introduction decision. The bird was extinct in the wild on Guam after brown tree snakes, introduced accidentally, preyed on it. Its cultural and spiritual significance to CHamoru people is also part of the context.

With the snake threat continuing on Guam and constraints facing the captive population, nine captive Sihek were released on Palmyra Atoll in 2024, more than 5,000 km from Guam. The authors describe several aims: increasing the global population, reducing the risks of relying only on captivity, informing possible future reintroduction to Guam, and sustaining support for conservation breeding. The release happened before the new framework was developed; the authors say the decision followed a similar process, not that the framework directed it.

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The USFWS’s 2024 overview also describes earlier examples: Nihoa millerbirds were introduced to Laysan in 2011 and 2012 to establish a second population, and giant tortoises were introduced to Santa Fe Island in 2015 to restore ecological functions. These examples illustrate different conservation aims; they do not establish that any introduction is risk-free.

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How does it differ from the Translocation Continuum Framework?

The two frameworks address related but different parts of conservation work. The 2026 framework is aimed at the broader choice of whether a conservation introduction is preferable to other strategies. The Translocation Continuum Framework focuses on stages within a translocation program.

Dimension Decision Support Framework for Conservation Introductions Translocation Continuum Framework
Primary question Should a conservation introduction be chosen among the available strategies? How should a translocation program progress through its stages?
Structure Six decision components, revisited as information changes. Five iterative phases: feasibility studies, pilot studies, primary trials, secondary experiments, and tertiary reinforcements.
Emphasis Objectives, alternatives, ecological and social risks, community engagement, and selecting a course of action. Criteria, tactics, progress measures, uncertainty, and population development across program phases.
Relationship to implementation Structures the strategy decision; it does not provide operational instructions for conducting or monitoring an introduction. Provides a phased structure for translocation programs.

Who is the framework for?

The framework was designed for the USFWS Pacific Region, which encompasses Pacific Northwest states, Hawaiʻi, and U.S.-associated Pacific Islands. Its authors say it may also help others considering a conservation introduction. USFWS says states, territories, and Tribes may use it whether or not the agency is involved.

Its development involved a multi-year effort. The authors of the 2026 perspective report input from more than 200 people representing state and federal agencies, Tribes, Native Hawaiian and Indigenous communities, conservation organizations, and others, gathered through webinars, workshops, briefings, and written requests, followed by an international expert panel and further refinement. A University of Hawaiʻi news report separately says more than 250 people across the Pacific region provided input; these are distinct reported tallies and should not be treated as one count.

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Does it explain how to carry out a conservation introduction?

No. The framework supports the choice of a conservation strategy; it does not set out how to design, implement, or monitor a particular move. USFWS describes implementation as a subsequent step that varies with the species, ecosystems, communities, and partners involved. A structured decision process can help surface trade-offs and uncertainty, but it cannot guarantee a safe move or a successful outcome.

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