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| a rarer sight: the ferruginous hawk Kent Keller |
In yet another example of the unintended and unexpected consequences of human activity on nature, it seems that our structures, including billboards and and power lines, are causing the rise of the common raven and the downfall of a genus of raptor that includes certain hawks and buzzards: http://blogs.discovermagazine.com/inkfish/2014/08/20/how-humans-are-helping-ravens-and-hurting-hawks/#.U_UcY0i5bgd
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