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Acer negundo Appendix basal area bird species black oak branches and trunks branches Dead trees branches of live Carya ovata Comparison between species Comparisons among bird contingency tables data from Stand dead and live Dead branches Dead Dead trees value Downy Hairy Redbelly downy woodpeckers flickers foraging habits hairies and downies Hairy Redbelly Redhead Hairy Total Downy hairy woodpeckers Importance Dead branches Live 75 live branches macrocarpa Median test Number of branches number of dead number of observations oak species observations on dead Ostrya virginiana Prunus serotina Quercus alba Redbelly Nuthatch Total Redbelly Redhead Nuthatch Redhead Nuthatch Total Redhead Total Downy rubra southern Wisconsin upland species for distribution species for observations Table l6A Tilia americana Total 50 Total Downy Nuthatch Total iko trunk live trees U.W. Arb Ulmus americana Ulmus rubra University of Wisconsin Vegetation data velutina white oak Willson Wisconsin Arboretum Wisconsin upland forests