Wayno - you hit that right on the head - I love it! Wow, no words to describe the detail that they are able to achieve. The hair, the feathers, the fringe on the dresses and war shirts - all moving from the motion of the figure or from unseen winds.
There are several places out west where this type of artist congregates - Santa Fe, New Mexico, Taos, NM, etc. But where these folks live is one of my favorites. If you have never been to the Black Hills of South Dakota, put it on your bullet list. The culture is unlike anywhere else.
Thank you Wayne for posting this. Of course it prompted me to look deeper and so here is the link to their website http://www.eckmanfineart.com/
Again, amazing work and a wonderful tribute to Native Americans and a period in our nations history that lives on as a result.
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Best regards and God Bless, Wayne