. Il campo Canadese-naturalista. Storia naturale. 460 Il canadese Field-Naturalist Vol. 111 Canada Mayflower (Maianthemum canadense), Bosco Equiseto (Equisetum sylvaticum), knotweed (Polygonum cilinode), ontano verde (Alnus viridis), e (Fireweed Epilobium angustifoli- um). Arbusti erano anche sparse; per esempio, non vi è stata nessuna entro 3 m di una delle stazioni di cui una Heather Vole è stato catturato. Arbusti presso il campo di boulder e altrove su una chiara definizione furono dominati dalla Lowbush mirtillo (Vaccinium angustifolium) e Labrador Tea {Ledum groenlandicum), incluso serviceberry {Amelanchier

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. The Canadian field-naturalist. Natural history. 460 The Canadian Field-Naturalist Vol. 111 Canada Mayflower (Maianthemum canadense), Woodland Horsetail (Equisetum sylvaticum), Knotweed (Polygonum cilinode), Green Alder (Alnus viridis), and Fireweed (Epilobium angustifoli- um). Shrubs were also sparse; for example, there was none within 3 m of one of the stations where a Heather Vole was captured. Shrubs at the boulder field and elsewhere on the clearcut were dominated by Lowbush Blueberry (Vaccinium angustifolium) and Labrador Tea {Ledum groenlandicum), and included serviceberry {Amelanchier sp.), willow, and Mountain Ash (Sorbus americana and S. decora). Trees were sparse and included Black Spruce, Jack Pine (Pinus banksiana), Tamarack (Larix laricind), Trembling Aspen (Populus tremuloides), Balsam Fir, and White Birch. Adjacent mature forest was Trembling Aspen, White Birch, Black Spruce. Red Pine (Pinus resinosa), and Jack Pine. Mosses and Cladonia spp. were abundant in boulder crevices. There was probably water within 1 m of the accessi- ble recesses of the boulders; water had been seen in the recesses in previous years. Most of the clearcut had dense Vaccinium spp. and Labrador Tea. Boulders and rocks at both sites were predominantly coarse grained granophyric granite. In 1996, one additional subadult male Heather Vole was secured at the site where two were taken in 1995. The specimen was trapped on the second of six nights of trapping. No other Heather Voles were taken at eight other sites, including the site where a specimen was secured in 1995, despite an extended six-day trapping session at each locality. Nor was any Heather Vole taken in 10 other trap- lines, each set for two days, or in more intense trap- ping efforts at two sites where small mammal cen- suses were attempted. Some (e.g., Negus 1950; Millar et al. 1985) have reported the habitat distribution of Heather Voles as relatively broad. The western habitats reported for Heather Voles were review

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