A Google search with the keywords specific to the course of study you want, including limiting the search to "edu" suffixes should give you a lot to mull over.

What kind of "conservation" do you have in mind? Environmental sciences, land management, forestry or biological sciences? The university where I studied toward a masters in Environmental Ethics has many of the above. University of North Texas in Denton, Texas. http://www.unt.edu.

SRS