Quote Originally Posted by William Malacarne View Post
But if you look at the whole picture where there are probably many 100,000's of towers in the USA then 10.5 birds per year starts to become a fairly large number. But I whole heartily agree that the numbers they give are basically useless.

One place where I am very sure that tagging has been very useful is with the California Condor program.

Bill
This is so much fun :D

Let's assume 1,000,000 towers and 10,000,000 birds are killed by the towers every year.

Hmmmm

5 billion birds create how many new birds each year reduced by 10 million birds that die as a result of the 1 million towers that benefit Man?

Seems like a good trade to me - 1,000,000 towers for Man; 10 million out of "X" billion birds born each year scarified for the benefit of Man.

I don't have a problem with those numbers assuming the correctness of the assumptions for the purpose of this discussion.