The Pennsylvania state bird is the Ruffed Grouse, a smallish brown-and-tan bird which prefers the state's woods and forests. If you've never seen one in person, the best time to go looking is during the summer, and you should consider trying to do sooner rather than later.
A new study released Thursday by the National Audubon Society suggests the Ruffed Grouse, along with seven other states' state birds, could largely or entirely leave their respective states' borders in future summers because of climate change.
The scenarios posed by the Audubon Society's study are still decades away, but the changes would be drastic.
From the study:
"Audubon scientists took advantage of 140 million observations, recorded by birders and scientists, to describe where 604 North American bird species live today — an area known as their “range.” They then used the latest climate models to project how each species’s range will shift as climate change and other human impacts advance across the continent. The results are clear: Birds will be forced to relocate to find favorable homes. And they may not survive."
If climate change raises global temperatures 2 degrees Celsius above pre-industrial levels by the end of the century, the Ruffed Grouse population would likely leave Pennsylvania altogether during the summer.