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2. Associated Vegetation <br />Characteristics <br />In- channel and along <br />Unvegetated <br />Johnson and Temple <br />banks <br />1980; <br />FWS 1981; <br />Johnson 1982 <br />Presence of unvegetated <br />In the vicinity of roosts; near <br />Johnson and Temple <br />sandbars) <br />the middle of the river with <br />1980; <br />very low elevation above <br />FWS 1981; <br />water with sloping shores <br />Johnson 1982 <br />3. Proximity to Forage Habitat <br />within 1 mile of suitable <br />Johnson and Temple <br />forage sites - wet meadows <br />1980; <br />FWS 1981; <br />Johnson 1982 <br />4. Disturbance Factors <br />Distance from <br />1/4 mile <br />Johnson and Temple <br />Disturbance <br />disturbance = roads, <br />1980; <br />residences, railroad tracks. <br />FWS 1981; <br />Johnson 1982 <br />Horizontal visibility <br />Faanes 1992 <br />upstream/downstream <br />1.2 miles <br />Johnson and Temple <br />across channel <br />1000 feet <br />1980; <br />FWS 1981; <br />Johnson 1982 <br />10 <br />