Each map is a visual guide to where a particular bird species may find the climate conditions it needs to survive in the future. We call this the bird’s “climatic range.”
The colors indicate the season in which the bird may find suitable conditions— blue for winter, yellow for summer (breeding), and green for where they overlap (indicating their presence year-round).
The darker the shaded area, the more likely it is the bird species will find suitable climate conditions to survive there.
The outline of the approximate current range for each season remains fixed in each frame, allowing you to compare how the range will expand, contract, or shift in the future.
The first frame of the animation shows where the bird can find a suitable climate today (based on data from 2000). The next three frames predict where this bird’s suitable climate may shift in the future—one frame each for 2020, 2050, and 2080.
You can play or pause the animation with the orange button in the lower left, or select an individual frame to study by clicking on its year.
Noisy and rambunctious, the Marsh Wren inhabits cattail marshes across much of the continent. Two populations are distinct, possibly representing separate species. Eastern birds require large marshland complexes, and local population declines have been documented; western birds are more adaptable, often occurring in small, degraded marshes. Audubon's climate model forecasts a 74 percent loss of current summer range, with some potential for expansion during the winter. At both times of year, the model shows a general drift northward of the potential range. If cattails are present in newly created areas of suitable climate, Marsh Wrens may adapt—especially in western North America.
Explore more birds threatened by climate change around the country.
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