During a ten minute period of time on March 17, 1969 ten photographs were made, each documenting the location in Central Park where an individually distinguishable bird call was heard. Each photograph was made with the camera pointed in the direction of the sound. That direction was then walked toward by the auditor until the instant that the next call was heard, at which time the next photograph was made and the next direction taken. The ten photographs join with this statement to constitute the form of this piece.
Douglas Huebler, “Duration Piece #5”
