Cross posted in Lawn Care forum.

I have moved into a new house where the previous owners have made some...interesting...decisions over the years. One such decision was interspersing a variety of lawn grasses.

In random order throughout the lawn, there are strongholds of Bermuda, St. Augustine, and fescue. Though I don't mind any of the species alone, the mix of textures of all three is aesthetically unpleasant and the general care requirements -- mowing height especially -- are incompatible. I need help determining which one to favor and how to crowd the others out.

Is there a way to successfully rid myself of two of the species in favor of the third? Any recommended, tried and true techniques? Should I favor any of the three over the rest? I don't necessarily care which one wins out, I just want to get it down to one species.

Thanks in advance.