Quote Originally Posted by walrus View Post
About 10 years ago, two scientists decided to estimate the total number of birds on the planet. The number they came up with was 200 to 400 billion individual birds. Compared to 5 billion people, this amounts to about 40 to 60 birds per person. Your second question, unfortunately, is much easier to answer.


We have more than enough birds, we can spare a few ten or hundred million
Those numbers are wrong.

There are nearly 8 billion human mammals in the world. ONE SPECIES. There are 5,416 species of mammals, probably 200 to 400 billion individuals.

THERE ARE SOME 8000 SPECIES OF BIRDS. There are probably several billion birds. Most species evolved long before humans.

Numbers of most species are declining every year, mainly due to 3 factors: cats, loss/degradation of habitat, and pesticides.


There is more genetic difference between an Indigo Bunting and a Great Blue Heron than between a human and a giraffe.