A female barred owl calls to her mate after leaving the nest briefly to stretch her legs. This barred owl call, which mimics "who cooks for you, who cooks for you, all" is the most common barred owl call.
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This is not a barred owl mating call, but is an owl call (or owl sounds) for communicating to other owls, or in this case, her barred owl mate. If you listen closely, you can hear the male barred owl call back.

Barred owls use a variety of different sounds and calls to communicate. The barred owl call featured here is the most recognizable of the bunch. Barred owls may be best known for their unique vocalizations, especially the unmistakable nine-noted hoot that is often translated to sound like, "Who cooks for you? Who cooks for you all?" Besides that catchy call, these owls can be heard shrieking, crying, trilling, grumbling, and squeaking, especially during courtship. Sound exciting? It is! A pair of courting owls is certainly a sound to behold! The forest comes alive with the male's chimpanzee-like calls and the females' higher pitched responses.

Here's a video showing the barred owl nest:

Video filmed in Ottawa, Ontario - Canada.
Date: May 1, 2013

Their offspring have been referred to as "Botched Owls".

I usually have midnight "conversations" between hooting Great Horned Owls in the neighborhood.
What's so cool is their silent movement is like they can almost teleport, And yet I KNOW for him to move from the tree across the street to behind the house he flew RIGHT OVER me...
Owls are such amazing birds, this one is a daytime owl - I don't know how many we have in the Sierras. I have heard daytime calls in the spring as well.