. Bulletin. Natural history; Natural history. PELLET I ii 2 PELLETS ^MALLARD [HBLACK DUCK ^PINTAIL HREDHEAD ' El RING-NECKED DUCK ^CANVASBACK ^LESSER SCAUP. 3 PELLETS 4 PELLETS Fig. 6.— Incidence of four levels of ingested shot found in gizzards of ducks of seven species in the autumn and early winter months of 1938-1954. Data are from table 18 and represent ducks shot by hunters in many parts of North 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 pe
. Bulletin. Natural history; Natural history. PELLET I ii 2 PELLETS ^MALLARD [HBLACK DUCK ^PINTAIL HREDHEAD ' El RING-NECKED DUCK ^CANVASBACK ^LESSER SCAUP. 3 PELLETS 4 PELLETS Fig. 6.— Incidence of four levels of ingested shot found in gizzards of ducks of seven species in the autumn and early winter months of 1938-1954. Data are from table 18 and represent ducks shot by hunters in many parts of North 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 resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
