Mystery Bird: Attwater's Prairie Chicken, Tympanuchus cupido attwateri

Female Tympanuchus pallidicintus?

It's hard to differentiate T. pallidicinctus females from T. cupido, but the Texas location argues for the former. The males are easier to tell apart by the colours of the wattles and pinnae. T. cupido attwateri exists in Texas, so I suppose that's a possibility. Finding a T. cupido pinnatus in Texas, or a T. cupido cupido anywhere, would be quite a coup.

I'm calling that a Lesser Prairie-Chicken, based on the Texas location and the "weakly barred belly" (Sibley).

I'm voting for Lesser Prairie Chicken simply because the Attwater's is so endangered.