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Distribution and Abundance of Predators that Affect
Duck Production: Prairie Pothole Region

Appendix


Table 14. Species composition (%) of large hawks in study areas in the prairie pothole region; based on daily tabulations of sightings of large hawks, 1983-88.

Areaa Year Sightings (N) Percentage of Total Observations
Northern
Harrier
Swainson's
Hawk
Red-tailed
Hawk
Ferruginous
Hawk
Canada
Alberta
Gayford 1985 324 11 64 25 0
Hay Lakes* 1983 133 45 8 47 0
1984 257 8 18 74 0
Holden* 1983 230 39 10 50 0
Penhold* 1984 204 22 13 62 3
1985 101 10 36 54 0
Manitoba
Cartwright 1983 63 41 30 29 0
Moore Park* 1983 94 46 26 29 0
1984 409 27 8 65 0
Saskatchewan
Ceylon 1983 236 53 46 0 1
1984 204 39 59 0 2
Craik 1984 94 73 21 5 0
1985 148 41 45 13 1
Denzil 1984 257 32 48 19 2
1985 464 33 36 29 2
Earl Grey* 1985 145 28 50 19 3
Goodwater 1983 307 61 37 0 3
Hanley* 1983 128 51 25 24 0
1984 207 65 8 26 1
1985 262 52 27 20 1
Inchkeith* 1984 269 16 32 52 0
1985 202 14 39 47 0
Leask* 1984 271 41 10 48 0
1985 299 28 3 69 0
Shamrock 1983 305 47 47 0 6
1984 250 36 61 0 3
1985 165 44 53 0 2
Yorkton* 1985 183 18 2 80 0
United States
Minnesota
Hawley* 1987 118 6 0 91 0
1988 138 18 0 80 0
Hitterdal* 1988 234 55 0 41 0
Lake Park* 1987 89 38 0 62 0
1988 188 51 0 44 0
Montana
Morgan 1983 227 41 42 0 17
Plentywood 1983 125 60 40 0 0
North Dakota
Courtenay 1988 130 60 25 15 0
Eldrige 1987 105 22 63 13 0
1988 175 49 32 15 2
Fredonia 1987 718 69 19 <1 11
1988 566 69 18 2 11
Jud 1987 228 51 41 4 4
1988 206 50 36 9 5
Kulm 1988 1074 52 35 8 5
Litchville 1987 140 12 74 14 0
1988 205 30 44 24 0
Plaza 1983 69 76 17 1 6
Sharon 1983 71 31 56 13 0
Streeter 1983 133 41 29 0 30
South Dakota
Hosmer 1983 99 30 26 8 35
Madison 1983 30 17 70 13 0
Parkston 1983 44 2 71 27 0

aStudy areas denoted with an asterisk (*) are in the aspen parkland, all others are in the prairie.


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