Calls

• Male territorial hoot or advertising song
  
  Recorded by Gerrit Vyn
  Oregon May 1990
• Female hoot
  
  Recorded by D. Archibald McCallum
  New Mexico May 1981
• Begging snores of nestlings and low amplitude hoot given by an adult announcing a food delivery to the nest
  
  Recorded by David S. Herr
  Oregon July 1990
• Bark by an alerted female, and nestling begging snore
  
  Recorded by David S. Herr
  Oregon July 1990
• Male alarm bark
  
  Recorded by D. Archibald McCallum
  New Mexico April 2003
• Female moan
  
  Recorded by D. Archibald McCallum
  New Mexico July 1983
• Distress shriek and bill clap
  
  Recorded by Greg Lasley
  Texas
Courtesy of Macaulay Library
© Cornell Lab of Ornithology.

Call a rather deep-pitched, single "hoot," like blowing across the top of a bottle.