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Assessing Breeding Populations of Ducks by Ground Counts

Table 5


Table 5. Breeding pair estimates and species coposition, Roseneath Study Area, 1952 to 1955.
Species Assigned breeding pairs 4-year average % species composition Mean pairs/square mile
1952 1952 1954* 1955
Dabblers:
     Mallard 54 49 41 33 44 33.1 31.5
     Blue-winged teal 31 27 35 24 29 21.8 20.7
     Widgeon 12 13 15 12 13 9.8 9.3
     Pintail 11 6 12 7 9 6.8 6.4
     Shoveler 4 3 5 3 4 3.0 2.9
     Green-winged teal 5 3 5 0 3 2.3 2.1
     Gadwall 3 3 2 3 3 2.3 2.1
Subtotal 120 104 115 82 105 79.1 75.0
Divers:
     Canvasback 12 10 10 8 10 7.5 7.1
     Redhead 4 10 6 5 6 4.5 4.3
     Lesser scaup 1 2 2 0 1 0.7 0.7
     Ruddy duck 4 10 14 15 11 8.2 7.9
Subtotal 21 32 32 28 28 20.9 20.0
Total 141 136 147 110 133 100.0 95.0
*Plus one pair of nesting ring-necked ducks.

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