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Figure 19. Proportion of wetlands defined as clear, turbid, or saline, by site use and wetland system, <br />1977 -1999 (p. 140). <br />Figure 20. Frequency distribution of 4 categories describing the distribution pattern of emergent <br />vegetation, by site use and wetland system, 1977 -1999 (p. 141). <br />Figure 21. Proportion of feeding sites and dual -use described as seasonal wetland, permanent wetland, <br />cropland, or upland cover, by site use, 1977 -1999 (p. 142). <br />Figure 22. Proportion of sites within 1 mile of feeding or dual -use sites described as seasonal wetland, <br />permanent wetland, cropland, or upland cover, by site use, 1977 -1999 (p. 142). <br />Figure 23. Percent composition of social groups within each type of feeding habitat, by site use, <br />1977 -1999 (p. 143). <br />Figure 24. Proportion of crop types occurring on feeding and dual -use sites, 1977 -1999 (p. 144). <br />Figure 25. Proportion of adjacent habitat described as seasonal wetland, permanent wetland, cropland, or <br />upland cover for palustrine and riverine roost sites, 1977 -1999 (p. 145). <br />Figure 26. Proportion of crop types occurring within 1 mile of feeding and dual -use sites, 1977 -1999 (p. <br />144). <br />Figure 27. Proportion of roost and dual -use sites that were <0.25, 0.25 -0.49, 0.50 -0.74, 0.75 -1.0, and <br />>1.0 mi from feeding sites, by site use, 1977 -1999 (p. 146). <br />Figure 28. Proportion of sites having visibility to <100 yards, 100 -440 yards, 440 -880 yards, and >880 <br />yards, by site use and wetland system or upland site, 1977 -1999 (p. 147). <br />Figure 29. Proportion of sites in private, federal, state, or other ownership, by season and site use, <br />1977- 1999 (p. 148). <br />Figure 30. Proportion of sites considered secure, threatened, or of unknown security that were under private <br />(P), federal (F), state (S), or other (0) ownership (p. 149). <br />v <br />