. The Canadian field-naturalist. 400 The Canadian Field-Naturalist Vol. 103 and M. W. Barrett, B. Bolwyn and L. E. Lillie for their review of the paper. This is a scientific contribution under the joint Alberta Government — Fur Institute of Canada research agreement. Literature Cited Davis, M. H. 1983. Post-release movements of intro- duced marten. Journal of Wildlife Management 47: 59-66. Montgomery, K. C. 1955. The relation between fear induced by novel stimulation and exploratory behavior. Journal of Comparative and Physiological Psychology 48: 254-260. Pullliainen, E. 1986. Behavior and or
. The Canadian field-naturalist. 400 The Canadian Field-Naturalist Vol. 103 and M. W. Barrett, B. Bolwyn and L. E. Lillie for their review of the paper. This is a scientific contribution under the joint Alberta Government — Fur Institute of Canada research agreement. Literature Cited Davis, M. H. 1983. Post-release movements of intro- duced marten. Journal of Wildlife Management 47: 59-66. Montgomery, K. C. 1955. The relation between fear induced by novel stimulation and exploratory behavior. Journal of Comparative and Physiological Psychology 48: 254-260. Pullliainen, E. 1986. Behavior and orientation of a released Pine marten (Martes martes). Zeitschrift fur Saugetierkunde 51: 49-51. Siegel, S. 1956. Nonparametric statistics for the behavioural sciences. McGraw Hill Co., New York. 312 pages. Wiggett, D. R., and D. A. Boag. 1986. Establishing colonies of ground squirrels during their active season. Wildlife Society Bulletin 14: 288-291. Received 15 December 1987 Accepted 28 September 1988 Beaver, Castor canadensis, Mortality Caused by Felled Trees in Alberta George W. Scotter1-2 and Etta Scotter2 'Canadian Wildlife Service, 4999-98 Avenue, Edmonton, Alberta T6B 2X3 24115 Aspen Drive West, Edmonton, Alberta T6J 2B5 Scotter, George W., and Etta Scotter. 1989. Beaver, Castor canadensis, mortality caused by felled trees in Alberta. Canadian Field-Naturalist 103(3): 400-401. The deaths of two Beaver, Castor canadensis, caused by felled trees are reported from Alberta. Key Words: Beaver, Castor canadensis, Alberta. On the afternoon of 13 October 1986 we found a large "blanket-sized" Beaver {Castor canadensis) along a trail on the east side of Whitemud Creek, Edmonton, Alberta, which had been killed by a felled tree. The trail is immediately below our house and as we were using it almost daily we believe the accident happened during the previous night. The felled Balsam Poplar (Populus balsamifera) which killed the Beaver was 36 cm in diameter at. Figi ri I. A
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