Didn some species fare really well over the past 40 years (even showing population increases)?
A-Yes, many of the species that moved north and inland increased in population at the same time. But it would be short-sighted to focus on what may appear to be short-term gains. Where food or habitat is available, species may do well in the short term, but ultimately the need to adjust to changing climate conditions can put species in peril in a variety of ways. Some will move into areas where an unusually harsh winter will still bring conditions they cannot survive. Others may be unable to find food or suitable habitat (especially if the healthy habitats they need, like grasslands) are already being decimated by overuse, pollution, and other threats. Even species that fare well amid the changes are likely to force out other, less adaptable birds, taking a long-term toll on ecological health and all it supports.
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