. The Canadian field-naturalist. 64 The Canadian Field-Naturalist Vol. 102 Morrison, M. L., and B. J. Walton. 1980. The laying of replacement clutches by Falconiforms and Strigiforms in North America. Raptor Research 14: 79-85. Newton, I. 1979. Population ecology of raptors. Buteo Books, Vermillion, South Dakota. 399 pp. Nielsen, O. K. 1986. Population ecology of the Gyrfalcon in Iceland with comparative notes on the Merlin and the Raven. thesis, Cornell University, Ithaca, New York. 215 pp. Piatt, J. B. 1976. Gyrfalcon nest site selection and winter activity in the western Canadian arct
. The Canadian field-naturalist. 64 The Canadian Field-Naturalist Vol. 102 Morrison, M. L., and B. J. Walton. 1980. The laying of replacement clutches by Falconiforms and Strigiforms in North America. Raptor Research 14: 79-85. Newton, I. 1979. Population ecology of raptors. Buteo Books, Vermillion, South Dakota. 399 pp. Nielsen, O. K. 1986. Population ecology of the Gyrfalcon in Iceland with comparative notes on the Merlin and the Raven. thesis, Cornell University, Ithaca, New York. 215 pp. Piatt, J. B. 1976. Gyrfalcon nest site selection and winter activity in the western Canadian arctic. Canadian Field-Naturalist 90: 338-345. Piatt, J. B. 1977. The breeding behavior of wild and captive Gyrfalcons in relation to their environment and human disturbance. thesis, Cornell University, Ithaca, New York. 173 pp. Poole, K. G. and R. G. Bromley. 1988. Natural history of the Gyrfalcon in the central Canadian Arctic. Arctic 41: 31-38. Ratcliffe, D. 1980. The Peregrine Falcon. Buteo Books, Vermillion, South Dakota. 416 pp. Temple, S. A. 1972. A portable time-lapse camera for recording wildlife activity. Journal of Wildlife Management 36: 944-947. Received 31 January 1986 Accepted 23 March 1987 Southern Bog Lemming, Synaptomys coopeh. New to Islands in Lake Michigan Charles A. Long and John Edward Long Department of Biology and Museum, University of Wisconsin, Stevens Point, Wisconsin 54481 Long, Charles A., and John Edward Long. 1988. Southern Bog Lemming, Synaptomys cooperi, new to islands in Lake Michigan. Canadian Field-Naturalist 102(1): 64-65. The first record of Southern Bog Lemmings on islands of Lake Michigan is reported. These mice, which have white feet, are found on Washington and Rock islands. Key Words: Southern Bog Lemming, Synaptomys cooperi, Wisconsin, Lake Michigan. Although numerous studies have been carried out on the islands in Lake Michigan, microtine voles have been seldom trapped on any of them (Long 1974; Hatt et al. 1948; Burt 1948; Baker
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