The research shows poleward and elevational movements as species track suitable climates, with many expanding into newly suitable areas while others contract or disappear from former habitats.

Authors stress the urgent need to limit global warming and acknowledge knowledge gaps, notably limited range-change data for many species and regional biases in tropical areas.

Across regions, range shifts vary: expansions are prominent in the tropics, while contractions are more common in Europe and North America, and elevation shifts are most evident in the Northern Hemisphere.

To forecast future shifts and guide conservation, researchers advocate integrating long-term monitoring with predictive models to identify refugia and critical habitats.

A comprehensive study across 105 countries and more than 1,700 butterfly species finds that climate change and extreme weather drive nearly 80% of documented geographic range shifts, with other pressures like intensive agriculture, urban expansion, habitat fragmentation, and invasive species also playing a role.

Some species show mixed patterns, expanding in some locales while contracting in others, underscoring uncertainty about long-term conservation status and the necessity for coordinated global monitoring, especially in the tropics.

If warming continues beyond certain thresholds, certain species—particularly island and mountain endemics with limited mobility—could face rapid declines or extinction as habitats become untenable.

Continued warming may trigger ecological thresholds that lead to population declines, with vulnerable groups having few options to escape heat stress.

Detecting contractions is harder than spotting expansions, and data biases—such as overrepresentation of lowland and urban observations—may skew results, highlighting the need for broader, more inclusive monitoring and citizen-science participation.

Conservation calls include protecting and restoring habitats, creating ecological corridors and microrefugia, and strengthening biodiversity monitoring, alongside global efforts to limit temperature rises.

Regional examples, such as Melbourne’s Eltham copper butterfly recovering through community-led habitat restoration and replanting, illustrate how local action can support species on the move.

The study documents poleward and elevational shifts as species track cooler climates, with species-rich communities moving to higher latitudes and elevations to remain within suitable temperature ranges.