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Overhead visibility <br />Absence of tall trees, dense <br />Johnson and Temple <br />shrubs or high banks near ( ?) <br />1980; <br />roost <br />FWS 1981; <br />Johnson 1982 <br />Screen <br />Sound barriers and visual <br />barriers may reduce the <br />influence of disturbance <br />(unquantified) <br />Forage Habitat <br />Wet Meadows <br />Interior Least Tern Habitat <br />Riverine Habitat <br />1. Channel /Sandbar <br />Characteristics <br />Channel Width <br />975 -1554 feet <br />Ziewitz et al. 1992 <br />Kirsh 1996 <br />Sandbar Area <br />0.03 to 3.58 acres <br />Ziewitz et al. 1992 <br />Kirsq 1996 <br />Mean Elevation above <br />0.2 -2.0 feet (mean =0.4 feet) <br />Ziewitz et al. 1992 <br />400 cfs stage <br />Maximum Elevation <br />0.4 -4.4 feet (mean 2.7 feet) <br />Ziewitz et al. 1992 <br />Above 400 cfs stage <br />11 <br />