Based on studies in:
This list may not be complete but is based on published studies.
- L. W. Swan, The ecology of the high Himalayas, Sci. Am. 205:68-78, from pp. 76-77 (October 1961).
- Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 16, 2011 at http://animaldiversity.org. http://www.animaldiversity.org
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