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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWildlife translocation is the broad practice of moving living organisms for release elsewhere; climate-focused assisted migration is a narrower strategy that deliberately moves a species beyond its indigenous range toward a place expected to remain suitable as the climate changes. In short, assisted migration can be a form of conservation translocation, but not every translocation is assisted migration. The terms are not used consistently, so it helps to define them before comparing projects.
What do the terms mean?
Wildlife translocation
Translocation is the umbrella activity: people move living organisms from one area for release or planting in another. When the move is intended to deliver a measurable conservation benefit, it is called a conservation translocation. The IUCN Species Survival Commission’s 2013 guidelines provide a framework for planning and assessing these actions, including reinforcement, reintroduction and assisted colonization (IUCN Conservation Translocation Guidelines).
Reinforcement and reintroduction
These are conservation translocations within a species’ indigenous range. Reinforcement adds organisms to a population that still exists. Reintroduction restores a population to part of its indigenous range where it has disappeared. The IUCN Conservation Translocation Specialist Group distinguishes these within-range actions from moves beyond the indigenous range (IUCN SSC Conservation Translocation Specialist Group).
Assisted migration and assisted colonization
In this article, assisted migration means a planned, climate-focused move beyond a species’ indigenous range to help it reach an area projected to be suitable under future conditions. The idea is that climate-driven range change may outpace the species’ natural dispersal, or barriers may prevent it from reaching the new area.
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The IUCN’s closest formal category is assisted colonization: a conservation introduction beyond the indigenous range to address an emerging or unavoidable threat. In climate discussions, assisted colonization overlaps substantially with assisted migration and the term managed relocation. There is no universally adopted definition of assisted migration; a 2014 systematic review found varied terminology and proposed a climate-specific definition (PLOS ONE terminology review).
How the strategies differ
| Question | Wildlife or conservation translocation | Climate-focused assisted migration |
|---|---|---|
| How broad is it? | Translocation is the umbrella activity; conservation translocation is the subset intended to achieve a measurable conservation benefit. | A narrower climate-adaptation approach, generally considered one kind of beyond-range conservation movement. |
| Where does the organism go? | Within or beyond its indigenous range, depending on the type of action. | Beyond its indigenous range, toward a location projected to provide suitable conditions. |
| What is the goal? | May include restoring a lost population, strengthening an existing one or achieving another defined conservation benefit. | Help a species or population track climate-driven changes in suitable habitat when natural dispersal is unlikely to be sufficient. |
| What is the central decision? | Whether the move is justified, feasible and likely to deliver a conservation benefit. | Whether the potential benefit to the moved species outweighs risks to the receiving ecosystem and people, compared with inaction or other adaptation options. |
The categories are useful distinctions, not labels that every project will fit neatly. A project’s purpose, destination and circumstances matter.
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Is assisted migration the same as rescuing displaced wildlife?
No. Rescuing and relocating an animal already displaced by injury, human conflict, development, illegal trade or a disaster is a different decision context from proactively moving a population to help it track future climate conditions. The IUCN’s 2025 guidance on responsible translocation of displaced organisms addresses those displacement cases and distinguishes them from planned climate-driven assisted colonization (IUCN guidelines on responsible translocation of displaced organisms).
When might a climate-driven move be considered?
The IPCC identifies assisted colonization or managed relocation as a possible option when a species cannot disperse and colonize naturally. Considering a move requires weighing scientific, ethical, economic and legal factors for both the organism being moved and the receiving ecosystem (IPCC Sixth Assessment Report, Working Group II, Chapter 2).
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A conservation goal alone does not establish that a translocation is appropriate. Decision-makers need to assess whether the destination is suitable, what ecological effects the introduced organism could have, and whether other adaptation measures or inaction pose lower risks. The assessment should account for consequences to people as well as ecosystems.
What are the risks and limits of the evidence?
- Effects on the receiving ecosystem: Organisms moved beyond their indigenous range may affect species and ecological relationships at the destination. The intended climate benefit does not make those effects automatically safe.
- Uncertain outcomes: The IPCC describes variable success across cases. The reviewed sources do not establish a single comparative success rate for assisted migration versus other translocation types.
- Context matters: A result from one species, site or method cannot establish that another move will work. Suitability and effects must be evaluated for the actual proposed destination.
- Terminology can obscure the decision: Because “assisted migration” is not defined uniformly, a project description should make clear whether the move is climate-driven and beyond the indigenous range.
What examples show—and what they do not
The IPCC chapter discusses individual cases, including a reported 225 km extension of Kirtland’s warbler breeding range using song playbacks, transplanting an annual legume beyond its poleward range limit, and orchid transplants to higher elevations in which all but one of 20 species survived. These are illustrations of particular interventions, not a general success rate or proof that the same approach is suitable for other species or sites.
The 2014 terminology review examined 868 scientific publications and identified 75 definitions. Those figures describe the review’s literature search, not the number of terms currently in use and not the effectiveness of assisted migration.
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