Global Short Term Trend: Decline of 10-30%
Comments: Range expanded in the southeastern U.S. in the middle part of the 1900s (NGS 1983), and North American Breeding Bird Survey (BBS) data indicated a significant population increase surveywide of 3.8% annually from 1966 through 1979. But in the years following (1980-1999), the same source showed a significant annual surveywide decline of -1.9% (Droege et al. 2000). The decline is most extreme in the north: Canada had a significant decline of -4.1% annually 1980-1999, and other significant declines greater than -4% per year were registered in the following BBS regions: Adirondacks, Northern New England, Northern Spruce Hardwoods, Central Rockies, and Northern Pacific Rainforests. The only region showing any significant increases was the southeast: Mississippi had an annual increase of 2.8% and Georgia showed an increase of 4.1% (Droege et al. 2000).
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