Copyright Question?
Yes, that would be a copyright violation. Of course, it's very unlikely that a large corporation would waste their time going after you for something like that, but they technically could if they wanted to.
Which environmental org is better?
Sierra is a bit more left and reactionary compared to Audubon. The Nature Conservancy is another good organiztion.
Who was Jonn James Audubon? Was he an artist?
Audubon made an intensive study of birds in America and Europe.He drew and painted all of the birds he studied and they can be found in his later published book.