Global warming is changing where birds breed
Global warming is shifting the behavior of migratory birds in the eastern regions of North America. Researchers have discovered that the breeding range of some birds is shrinking, while for others this range is expanding.
According to the study, birds that both breed and winter in North America are extending their ranges north where warming temperatures have created new, suitable places to breed.
The findings indicate that bird species such as Carolina wrens and red-bellied woodpeckers will be able to adapt to future climate change.
On the other hand, some birds have breeding ranges that are dwindling. Neotropical migratory birds breed in North America during the summer and migrate to the Caribbean, Central America, and South America for the winter.
Neotropical migrants include warblers, orioles, flycatchers, and other species that birdwatchers look forward to spotting in the spring. The researchers found that Neotropical birds are not expanding north, yet their suitable southern range is shrinking.
Over the past five decades, Neotropical bird populations have decreased by about 2.5 billion individuals.