DULUTH, Minn. — The number of birds counted each summer on Minnesota’s Chippewa and Superior National Forests nearly doubled from 1994 to 2009 but crashed by 30 percent this year after back-to-back cold, late springs.
And the legacy of this year’s poor nesting season could last into next year, with fewer chicks hatched this summer and even fewer birds returning to be counted in 2015.
That’s the conclusion of the annual Summary of Breeding Bird Trends released recently by researchers at the Natural Resources Research Institute of the University of Minnesota Duluth.
The number of total birds counted in the survey, now in its 20th season, has moved up and down in fits and spurts but has trended up over the long haul.
Continued ...
That’s the conclusion of the annual Summary of Breeding Bird Trends released recently by researchers at the Natural Resources Research Institute of the University of Minnesota Duluth.
The number of total birds counted in the survey, now in its 20th season, has moved up and down in fits and spurts but has trended up over the long haul.
Continued ...
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