By Olaus Johan Murie
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In the absence of adequate breeding stimuli, they may respond to inadequate signals and hybridize (Mayr 1963). Recent evidence from several areas of North America suggests that coyotes may hybridize both with gray wolves Kolenosky 1971; Mengel 1971; Kolenosky and Standfield 1975; Lawrence and Bossert 1975; Hilton 1976) and red wolves (Canis rufis) (Paradiso and Nowak 1971; Riley and McBride 1972; Gipson et al. 1974; Elder and Hayden 1977). Coyote-dog crosses are considered much less likely in Yellowstone due to its remoteness and the peculiar reproductive timing of such hybrids (Mengel 1971).
1914. Scout diary. Yellowstone Natl. Park Arch. Meagher, M. M. 1973. The Bison of Yellowstone National Park. NPS Sci. Monogr. Ser. No. 1 . 1 6 1 ~ ~ . Mealey, S. P. 1975. The natural food habits of free ranging grizzly bears in Yellowstone National Park, 1973-74. S. , Bozeman. l58pp. Mech, L. D. 1970. The wolf:the ecology and behavior of an endangered species. Natural History Press, New York. 389pp. 1971. Where the wolves are and how they stand. Nat. Hist. 80(4):26-29. 1974. Canis lupis. Mammalian Species No.
A population analysis of the Yellowstone grizzly bears. Mont. For. and Conserv. Expt. Sta. Bull. 40. Univ. Montana, Missoula. 20pp. Despain, D. 1973. Major vegetation zones of Yellowstone National Park. Yellowstone Natl. Park Info. Paper No. 1 0 . 4 ~ ~ . Diem, K. , L. A. Ward, and J. J. Cupal. 1973. Cameras as remote sensors of animal activities. Univ. Wyoming, Laramie. 10pp. Dirks, R. A. 1976. Climatological studies of Yellowstone and Grand Teton National Parks, continuing studies. Dept. Atmospheric Sciences, Univ.
A Field Guide to Animal Tracks by Olaus Johan Murie