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Left panel: side view of a cage with furnishings. Right panel: top view of a cage as seen on the video images. For the automatic tracking of the bird in the cage, distinct locations of the cage were allocated to areas of this image. Areas hatched in white were combined as “peripheral locations” for analysis (this must not be confused with the “front” and “back” section (not illustrated), where the full cage is split along its longitudinal axis).
