How Climate Change Is Reshaping Where Birds Live

Climate change is already rewriting the map of where birds live and when they breed. Birders are often the first to notice these shifts — and the data they collect is helping scientists understand a fast-moving story.

Ranges are shifting

As temperatures rise, many species are moving poleward and to higher elevations, tracking the climate conditions they're adapted to. Birds once considered 'southern' are appearing farther north; some northern and mountaintop species are running out of cooler places to go.

Timing mismatches

Many birds time migration and breeding to the spring flush of insects. As warming shifts the timing of insect emergence and plant growth, birds can arrive or hatch out of sync with their food supply — a 'phenological mismatch' that can reduce breeding success.

Extreme weather and habitat loss

• Stronger storms, droughts, and heat waves directly kill birds and degrade habitat.
• Sea-level rise threatens coastal marshes that shorebirds and marsh specialists depend on.
• Wildfires reshape forests and the species that live in them.

What the projections say

Audubon's climate research projects that a large share of North American bird species are vulnerable to range loss under continued warming — but also that limiting warming dramatically reduces the risk. The future isn't fixed; it depends on what we do.

How birders help

Documenting where and when you see birds — through eBird and apps like Birder AI — creates the long-term records scientists use to detect range shifts and timing changes. Supporting habitat protection and climate action matters most, but careful observation is a real contribution. Your sightings are part of the early-warning system.