Thank you all for your suggestions and all have workability.
Big Spring is probably my first choice because I owe myself a trip back to that area after a reasonably unsuccessful Sandhill Crane trip not last winter but the winter before. We went through the park but being winter there wasn't much to see.
I've not really been to Abilene other than a trip with my photo club to see a program from a Canon Pro Rep at a meeting of the
West Texas Photographic Society, so that is a trip that is on my list.
Ft Worth Nature Center and Witchita Mountains Wildlife Refuge are for reasons I will not elaborate on here, possibilities given some necessary travel to Dallas and Witchita Falls over the next few months.
I promise I will post the results of these trips when/if they happen.
Many thanks again - jim