Abstract
Broadcast vocalizations have been used to augment winter point counts. We investigated the effects of time and Strix varia (Barred Owl) playback on woodpecker detection. Habitats were classified as upland pine, bottomland hard- wood, and mixed pine-hardwood stands. Ten unlimited-radius, silent point counts of 3-min and 10-min duration were conducted in each habitat type on alternating weeks. During alternate weeks, silent counts followed by Barred Owl playback and post- playback counts were conducted. Detection was significantly greater during 10-min silent counts than during 3-min silent counts. We detected more woodpeckers after Barred Owl playback than during 3-min silent counts prior to playback. Species diversity was highest in mixed pine-hardwood stands, although abundance was lower than in hardwood stands. Mixed stands may not be able to support high woodpecker densities as well as bottomland hardwood forests.
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