Coloring, scalation and head shape all scream Indigo to me. The Texas Indigos are known for that brownish facial coloring as opposed to the red of the Easterns. Even if it was a dull colored Eastern, the range of the WDB doesn't get close to the Easterns, so we are left only with the Texas. This of course is starting with the assumption that these pictures were taken in the wild and not staged in someone's back yard. After doing some additional Googleing, I found this (see link below) which has a more complete series of photos for this event.
Texas Indigo

[ Show Entire Thread ]