. Bulletin - Biological Survey. Zoology, Economic. 96 WOODPECKERS IN" EELATION TO TREES. cambium, the securing of which results in serious damage, as shown in the preceding pages. HOW TO RECOGNIZE SAPSUCKERS. Plate I (frontispiece) and Plate II (p. 16) will serve to identify the sapsuckers better than pages of printed descriptions, and there- fore only a few marked color differences will be mentioned here. All sapsuckers have yellow bellies, few other woodpeckers have; all sap- suckers have a conspicuous white patch on the upper part of the wing, as seen from the side when clinging to a t
. Bulletin - Biological Survey. Zoology, Economic. 96 WOODPECKERS IN" EELATION TO TREES. cambium, the securing of which results in serious damage, as shown in the preceding pages. HOW TO RECOGNIZE SAPSUCKERS. Plate I (frontispiece) and Plate II (p. 16) will serve to identify the sapsuckers better than pages of printed descriptions, and there- fore only a few marked color differences will be mentioned here. All sapsuckers have yellow bellies, few other woodpeckers have; all sap- suckers have a conspicuous white patch on the upper part of the wing, as seen from the side when clinging to a tree; white wing patches in other woodpeckers are on the middle or lower part of the wings. The yellow- bellied sapsucker of transcontinental range is the only woodpecker having the front of the head (i. e., from bill to crown) red in combi- nation with a black patch on the breast. The red-breasted sap- sucker lives west of the Rockies and is the only species there having the whole head and throat red. From 4 to 11 spe- cies of woodpeckers other than sapsuck- ers occur in various sections of the United States; hence a majority of woodpeckers seen are not sapsuckers. Several of these species are illustrated (figs. 38 to 44), and notes are given on the features distinguishing them from Fig. 42.—Hairy woodpecker. Not a sapsucker. No black breast spot. DEFENSIVE MEASURES AGAINST SAPSUCKERS. Mr. C. G. Bates says of the eastern bird: The sapsucker spends only his winters in the hardwood region, and the greatest damage is done on warm winter days and in the spring just before migration. For this reason hickories should not be planted, especially in the South, in situations where they will be started by the first warm days, but rather where their rise of sap will be Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemb
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