Greetings Mark:
With a little Web searching, I'm sure you can stumble across some information regarding online forestry / natural resources / conservation degree and certificate programs.
After a quick Web search, I stumbled across the following (not exhaustive):
University of Illinois:
http://www.nres.uiuc.edu/Dynamic.aspx?PageId=60
University of Idaho:
http://www.uihome.uidaho.edu/default.aspx?pid=41841
Oregon State University:
http://ecampus.oregonstate.edu/online-degrees/undergraduate/nr/
All you need to do is spend a little time on the internet to find exactly what you are looking for...
Best of luck!