Just as important; how much do nature, travel, and landscape photographers make? Most do not make near as much as commercial photographers.
There is a great post on Rob Haggerts blog: A Photo Editor, where his guest columnists are asked one question and they answered “How Much Money Do Commercial Photographers Make?” awhile back in another post.
The follow ups to that post are very enlightening into not only how much can be made but also shows the wide range of income that the commercial photography community has, just like most business’s.
In today’s environment I think many outdoor photographers would benefit from diversifying their skill set into more commercially viable options for their outdoor photography. Giving your clients more options and reasons to use you never hurts business!