Or in the case of a great blue heron, would it be Greatstanding?
Which brings up a question I have: If your parents' parents are called your grandparents, wouldn't your niece's daughter be called your grandniece? So why do we use the term great niece instead?
Since grandparents' parents are great grandparents, then I think your grandniece's daughter would then be your great grandniece. In other words, you don't get the "great" title until you're at least three times removed. :)