Re: How many birds are there on earth?

Fisher (1951), a British ornithologist, estimated there are more than 100 
billion individual wild birds in the world.  The Wilson's stormpetrel, 
Oceanites oceanicus, a seabird, is probably the most numerous wild bird in 
the world, and the starling and the house sparrow may by the most abundant 
wild land birds (Fisher, 1951).  Obviously, this is an estimate, but an 
educated one.  

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                                         -Marcy LaViollette