How much bird is there, anyway?
10,000 Birds
JULY 21, 2011
Here’s some data from the famous research project of Manu, Peru, giving biomass in kilograms per hectare. The largest bird, forming the short bar on the right of the bird histogram, is a swan. 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.
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