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Platte River Ecology Study


Appendices


Appendix D. Characteristics of the Platte River at sites known to have been used by whooping cranes.
Sighting       Activity      Width     Depth       Horizontal        Overhead       Aquatic       Presence of    Type of        Isolation          Bottom       Distance 
location       of            of        of          visibility        visibility     vegetation    sandbars in    sandbars                          material     to feeding
and date       cranes        river     river                                                      river                                                         site

21-22 roosting, approx maximum bank-to-bank good none yes low, 1-2 Chapman moving 5 miles October 1966 loafing 250 m of 46 cm and unlimited . degree Bridge sand and to the 6 mi. upstream and . slopes, visible some small S.W. N.E. of downstream . devoid of both banks gravel Phillips . vegetation lined with . tall trees; . hunting blinds . in channel 31 October roosting, approx. approx. bank-to-bank good, but none yes some are low, 1-80 moving foraged in 1 November probing, 260 m 2.5-10 cm in most places, possibly . 1-2 degree audible to sand river; 1974 flying up at roost but limited limited . slopes, and the north; and flew 1/2- 2 mi. E. and down site, locally by some locally by . devoid of tall some 1 mile to of Minden river channel vegetated indigo-bush . vegetation; vegetation small field to I-80 deeper sandbars; on some . others have on both banks gravel the south interchange good upstream sandbars . shrubs and hunting blinds and downstream . banks in channel 17 April loafing 135- 0.6-0.8 m probably bank- good, but none yes - small, channel lined moving approx. 2 1980 185 m deep to-bank and possibly occasional covered with occasional sand miles; 1 4 1/2 mi. S. where very good both limited bars in with cottonwoods; and mile to the and 1/2 mi. cranes upstream and locally this willows commercial sand gravel south W. of Gibbon were downstream by small stretch of and gravel loafing willows on the river operation 1/4 mi. sandbars . E.; site . surroundings . owned by NAS 18 April probably approx. 46-51 cm probably bank good, but none yes sandbars are willows and moving probed in 1980 overnight 185 m in channel to-bank in possibly several low (2-3" scattered sand river 5 1/2 mi. roosting; cranes in most places limited sandbars high) and cottonwoods on and S and 5 mi. also loafing shallower and very good locally by in area devoid of bank; bridge gravel W. of Gibbon preening, water at upstream and small willows . vegetation visible to the dancing edge of downstream and some . some west and probing sandbar sandbars . vegetated . sandbars . nearby

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