Who, who

You call in the early morning,
  hallowing the day with a call.
Who, who, who, who-who,
  who are we in this land.
Strange and quiet, lovely and
  frightening, yet amazing.
How do we answer the question,
  where do we find our space?
We are but a breath, a short thing
  in the midst of this cycle of life.
Wonder, old, ancient, eternal,
  who has heard your call?