. The Canadian field-naturalist. 1976 Notes 369 Table 1 —Percentage of hunters who indicated more grouse and hares present than in the previous year on hunting Hcense returns. Number of repHes are given in parentheses. East-central Labrador Year Snowshoe hare Grouse- Western Labrador' Grouse- 1968-69 1969-70 1970-71 1971-72 1972-73 47(19) 80(20) 88(17)3 40(10) 54(43) 73(26) 52(27) 57(21)3 6(17) 88(24) 67(17)-' 0(12) 15(13) 0(6) I Licence return data not available for snowshoe hares. ^Spruce Grouse and Willow Ptarmigan are by far the most abundant species but Ruifed Grouse (Bonasa umhellus) and
. The Canadian field-naturalist. 1976 Notes 369 Table 1 —Percentage of hunters who indicated more grouse and hares present than in the previous year on hunting Hcense returns. Number of repHes are given in parentheses. East-central Labrador Year Snowshoe hare Grouse- Western Labrador' Grouse- 1968-69 1969-70 1970-71 1971-72 1972-73 47(19) 80(20) 88(17)3 40(10) 54(43) 73(26) 52(27) 57(21)3 6(17) 88(24) 67(17)-' 0(12) 15(13) 0(6) I Licence return data not available for snowshoe hares. ^Spruce Grouse and Willow Ptarmigan are by far the most abundant species but Ruifed Grouse (Bonasa umhellus) and Rock Ptarmigan (Lagopus mutus) are also present. ^Indicates peak year of abundance. information from a small number of hunting license returns on snowshoe hare and grouse [primarily Spruce Grouse {Canachites canadensis) and Willow Ptarmigan (Lagopus lagopus)]-, in these the hunter was asked his opinion on species abundance relative to the previous year (Table 1). Returns for hare were not available for western Labrador; however, hunters and trappers indicated, in conversation with the authors, that numbers peaked in 1971 72. The use of Osprey nests by owls fluctuated during the study (Figure 1). Although we have no data on owl population size, nesting rates, or food habits our data suggest a relationship between the proportion of. Figure 1. Percentage of Osprey nests checked between late May and 1 July in which Great Horned Owls were nesting in the western and east-central Labrador study areas, 1969-1973. Sample sizes are in paren- theses. Osprey nests used by owls and larger prey abundance. In east-central Labrador use of Osprey nests peaked in 1972 coincident with hare and grouse population peaks in 1971-72. In western Labrador the rela- tionship is not clear. Nest use peaked in 1971 while hare numbers were increasing and grouse populations were declining. We thank W. C. Chaulk and J. D. Folinsbee, Newfoundland and Labrador Wildlife Division, and W. J. Learning, Canadian W
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