How much bird is there, anyway?
10,000 Birds
JULY 21, 2011
But if you look at a bit of prairie in South Dakota during the dead of winter, you may see very few birds and a lot of bison. The clifftop habitats along rocky shores of the North Atlantic (on both sides of the pond) abound in bird biomass during breeding bouts, for instance. Accessed July 12, 2011 at [link] a.
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