USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Assessing Breeding Populations of Ducks by Ground Counts

Table 15


Table 15. Yearly trends of indicated breeding populations of dabblers and ponds from mid-May ground counts,Kindersley Study Area, 1956 to 1967.
May date 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
14 13 10 15 11 10 17 15 10 14 14 20
Mallard 274 401 191 151 69 63 54 37 40 39 97 129
Pintail 193 315 161 47 37 40 40 19 19 60 132 139
Widgeon 75 80 35 37 34 33 19 6 12 23 39 57
Shoveler 31 59 35 27 20 5 12 20 16 32 50 51
Gadwall 63 38 25 16 17 8 13 8 14 16 26 50
Blue-winged teal 29 91 31 23 13 7 8 3 8 18 18 13
Green-winged teal 16 8 29 5 4 24 11 3 5 11 11 7
Total indicated pairs 681 992 507 306 194 180 157 96 114 199 373 446
Number of ponds on census date 81 43 29 22 30 33 35 11 17 59 51 49
Total pond acreage 609 479 227 155 162 158 174 82 115 618 550 571
Total pond shore line feet x 103 115, 87, 58, 39, 45, 44, 51, 15, 22, 110, 99, 94,
Number of ponds, June 1 64 14 20 13 15 21* 26 8 9 49 42 43
Number of ponds, July 1 49 7 8 4 8 10* 15 4 3 38 30 24
*After 1961, estimated from May water depths, expected loss to july and general observations August 1-15.
Note: Estimates accurate for mallards and pintails only, but show general trends for other species.

Previous Section -- Table 14
Return to Contents

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/duckcoun/table15.htm
Page Contact Information: Webmaster
Page Last Modified: Friday, 01-Feb-2013 19:13:48 EST
Sioux Falls, SD [sdww55]