There are many ways to make money with your nature photography, so long as you take the time to get really good at your craft ;-)
Here are 10 ways:
1. Sell your prints at etsy.com
2. Sell your work on ebay.com
3. Sell your images to stock photography sites.
4. Create products on zazzle.com
5. Create products on cafepress.com
6. Create cool photo books on blurb.com
7. Get a website and start marketing your work.
8. Put your photos on canvas or frame them and find local places to hang them in high traffic areas. Give the owner a cut of your earnings.
9. Place your work on outside art websites like fineartamerica.com.
10. Sell your work at a local gallery.