Factors Associated with Duck Nest Success
in the Prairie Pothole Region of Canada

Appendix A

Table 2. Estimated density (pairs/km²) of breeding gadwalls on study areas (mean=26.8 km²) in the Prairie Pothole Region of Canada.

Study area	Density of pairsa
	1982	1983	1984	1985
Parkland
Earl Grey	-	-	-	1
Hanley	2	1	<1	2
Hay Lakes	-	2	2	-
Holden	-	1	-	-
Inchkeith	-	-	1	<1
Leask	-	-	1	2
Moore Park	-	1	1	-
Penhold	-	-	0	<1
Yorkton	-	-	-	0
Mean	2	1	1	1
Prairie
Cartwright	-	1	-	-
Ceylon	-	7	2	-
Craik	-	-	2	1
Denzil	-	-	2	1
Gayford	-	-	-	2
Goodwater	-	2	-	-
Shamrock	1	2	2	1
Tichfield	1	-	-	-
Mean	1	3	2	1
Overall Mean	2	2	1	1
aExtrapolated from counts provided by Off.   Migr. Bird Manage., U.S. Fish and Wildl.   Serv., Laurel, Md.

Table 3. Estimated density (pairs/km²) of breeding blue-winged teals on study areas (mean=26.8 km²) in the Prairie Pothole Region of Canada.

Study area	Density of pairsa
	1982	1983	1984	1985
Parkland
Earl Grey	-	-	-	2
Hanley	<1	1	1	5
Hay Lakes	-	9	8	-
Holden	-	8	-	-
Inchkeith	-	-	<1	3
Leask	-	-	5	7
Moore Park	-	7	7	-
Penhold	-	-	1	<1
Yorkton	-	-	-	4
Mean	<1	6	4	4
Prairie
Cartwright	-	2	-	-
Ceylon	-	6	3	-
Craik	-	-	1	2
Denzil	-	-	4	6
Gayford	-	-	-	3
Goodwater	-	6	-	-
Shamrock	3	6	1	0
Tichfield	2	-	-	-
Mean	2	5	3	3
Overall Mean	1	6	3	3
aExtrapolated from counts provided by Off.   Migr. Bird Manage., U.S. Fish and Wildl.   Serv., Laurel, Md.

Table 4. Estimated density (pairs/km²) of breeding northern shovelers on study areas (mean=26.8 km²) in the Prairie Pothole Region of Canada.

Study area	Density of pairsa
	1982	1983	1984	1985
Parkland
Earl Grey	-	-	-	1
Hanley	2	1	<1	4
Hay Lakes	-	2	3	-
Holden	-	4	-	-
Inchkeith	-	-	0	1
Leask	-	-	4	3
Moore Park	-	4	1	-
Penhold	-	-	<1	1
Yorkton	-	-	-	1
Mean	2	3	1	2
Prairie
Cartwright	-	<1	-	-
Ceylon	-	3	1	-
Craik	-	-	0	1
Denzil	-	-	1	2
Gayford	-	-	-	3
Goodwater	-	7	-	-
Shamrock	5	7	1	1
Tichfield	2	-	-	-
Mean	3	4	1	1
Overall Mean	2	3	1	2
aExtrapolated from counts provided by Off.   Migr. Bird Manage., U.S. Fish and Wildl.   Serv., Laurel, Md.

Table 5. Estimated density (pairs/km²) of breeding northern pintails on study areas (mean=26.8 km²) in the Prairie Pothole Region of Canada.

Study area	Density of pairsa
	1982	1983	1984	1985
Parkland
Earl Grey	-	-	-	1
Hanley	3	<1	2	1
Hay Lakes	-	2	1	-
Holden	-	6	-	-
Inchkeith	-	-	0	1
Leask	-	-	1	<1
Moore Park	-	2	2	-
Penhold	-	-	<1	1
Yorkton	-	-	-	1
Mean	3	2	1	1
Prairie
Cartwright	-	1	-	-
Ceylon	-	7	2	-
Craik	-	-	1	2
Denzil	-	-	2	4
Gayford	-	-	-	2
Goodwater	-	7	-	-
Shamrock	5	4	2	2
Tichfield	2	-	-	-
Mean	4	5	2	3
Overall Mean	4	4	2	2
aExtrapolated from counts provided by Off.   Migr. Bird Manage., U.S. Fish and Wildl.   Serv., Laurel, Md.