. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. WATERFOWL NESTING STUDY 77 without good cover until the nesting season was well under way and i;se(l only by late nesters, nearly all fields included in the study were those which had also been planted to rice the previous year and sup- ported rank vegetative cover on the check dams (Figure 2). 3. Pasture. Any habitat type where grazing of livestock was included in the land use, either intentionally or accidentally. 4. Grain field. Ei
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. WATERFOWL NESTING STUDY 77 without good cover until the nesting season was well under way and i;se(l only by late nesters, nearly all fields included in the study were those which had also been planted to rice the previous year and sup- ported rank vegetative cover on the check dams (Figure 2). 3. Pasture. Any habitat type where grazing of livestock was included in the land use, either intentionally or accidentally. 4. Grain field. Either standing or freshly mowed grains, invariably barley in the study plots of this investigation. 5. Wasteland, marsh, and fields ivhich were not utilized for stock grazi7ig during the FIGURE 2. A portion of the Christenson-MacHenry rice fields. Photograph by aufhor. Table 4 compares nesting success in the different types of nest sites. A comparison of Table 1 with Table 4 demonstrates the attractiveness of rice checks as nest sites, especially considering the small amount of dry land involved. FATE OF DUCK NESTS Table 5 shows the fate of all duck nests included in the sample. A total of 333 nests was located, of which percent hatched, per- cent were deserted, and percent were destroyed. Of the 174 de- stroyed nests, percent were known to have been victimized by predatory mammals. Table 6 compares the nesting success in nine different plots. Three of these yielded such small samples that the results may be considered insignificant. The highest rate of success was enjoyed on the Christenson-Mac- Henry Ranch, where percent of all duck nests hatched and only 5—44240. 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 California. Dept. of Fish and Game; California. Fish and Game
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