. The Canadian field-naturalist. 1990 Melvin, Stephen, and Temple: Sandhill Cranes 355 part of the Interlake, 50 to 120 km north- northwest of Winnipeg (51° 30'N, 98° OO'W). It was roughly bounded to the west by Route 6 and Lake St. Martin, to the north by the Dauphin River and Lake Winnipeg, to the east by Lake Winnipeg, and to the south by an arbitrary line running from Ashern and Fisher Branch east to the head of Washow Bay on Lake Winnipeg (Figure 1). The Interlake is a sparsely populated area at the southern edge of the Boreal Forest region (Rowe 1959) and at the northeastern fringe of Ma
. The Canadian field-naturalist. 1990 Melvin, Stephen, and Temple: Sandhill Cranes 355 part of the Interlake, 50 to 120 km north- northwest of Winnipeg (51° 30'N, 98° OO'W). It was roughly bounded to the west by Route 6 and Lake St. Martin, to the north by the Dauphin River and Lake Winnipeg, to the east by Lake Winnipeg, and to the south by an arbitrary line running from Ashern and Fisher Branch east to the head of Washow Bay on Lake Winnipeg (Figure 1). The Interlake is a sparsely populated area at the southern edge of the Boreal Forest region (Rowe 1959) and at the northeastern fringe of Manitoba's agricultural region. The climate is subhumid and continental, with long cold winters and short warm summers. Annual precipitation is about 51 cm, 70% of which falls as rain between April and October. The transition from winter to summer is abrupt and generally occurs in April. The topography of the Interlake is one of low relief, with calcareous glacial tills and occasional lacustrine deposits overlying limestone and dolomitic bedrock (Mills and Smith 1971; Smith et al. 1975). Narrow drumlins, glacial striations, and strand lines generally running north to south act as impediments to surface drainage and have created a low ridge and swale topography. The surface is level to gently sloping and is poorly drained; local flooding often occurs during the spring thaw and after heavy rains. Peat accumulation and beaver activity also act to impede surface drainage. The resulting landscape is a mosaic of low forested ridges interspersed with low-lying, poorly-drained, forested muskegs of Black Spruce {Picea mariana) and Tamarack {Larix laricina), open bog and fen muskegs, and small intermittent lakes. Climate and soil conditions have resulted in vegetation generally characteristic of the southern part of the Boreal Forest region (Rowe 1959). Trembling Aspen (Populus tremuloides), is common in the southern part of the study area and represents an intermediate successional stag
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