While watching Cowboys & Aliens(2011) in a couple of scenes there was a hummingbird. It was not clear if it was actually present or if it was only in Jake's mind. I watched all the bonus material on the DVD and did not see any reference to it.
"good spirit" that could represent either Alice or Ella
In the novelisation of the film, the final appearance of the hummingbird is explicitly stated to represent the end of his journey;
He raised his head again, to see the hummingbird flying off into the distance, vanishing almost before his eyes could see which way it went...realizing that he truly was free to choose his own path, at last.