Kays, R. W. 2006. My Kingdom for a Crown. Natural History 115(4):72.

Kays, R. W. 2006. The Mane Thing about Lions. Legacy: The Magazine of the New York State Museum 2(2):7.

Kays, R. W. 2005. Mapping Mammals: Moving from Paper Tags to Digital Maps. Legacy: The Magazine of the New York State Museum 1(1):3-4.

Kays, R. W. 2003. Social Polyandry and Promiscuous Mating in a Primate-like Carnivore: the Kinkajou (Potos flavus). In Monogamy: Mating Strategies and Partnerships in Birds, Humans and Other Mammals, edited by U. H. Reichard, and C. Boesch, pp. 125-137. Cambridge University Press, Cambridge, United Kingdom.

Kays, R. W. 2002. Lion: Panthera leo. The Encyclopaedia Britannica

Kays, R. W. 2002. The How and Why of Radio-tracking: A Review of "A Manual for Wildlife Radio Tagging (Kenward 2001) and Radio Tracking and Animal Populations (Millspaugh and Marzluff eds.)". Animal Conservation 3:259.

Kays, R.W. 2001. Kinkajou. In The Encyclopedia of Mammals, edited by D. W. MacDonald, pp. 92-93. Oxford University Press, Oxford.

Kays, R. W. 2001. Olingos. In The Encyclopedia of Mammals, edited by D. W. MacDonald, pp. 94. Oxford University Press, Oxford.

Kays, R. W. 2001. Ringtail and Cacomistle. In The Encyclopedia of Mammals, edited by D. W. MacDonald, pp. 95. Oxford Univrsity Press, Oxford.

Kays, R. 2000. Keeping the Peace in Tsavo National Park. In The Field 71(2):2-7.

Kays, R. W. 2000. The Behavior of Olingos (Bassaricyon gabii) and Their Competition with Kinkajous (Potos flavus) in Central Panama. Mammalia 64:1-10.

Kays, R. W., and Allison, A. 2001. Arboreal Tropical Forest Vertebrates: Current Knowledge and Research Trends. Plant Ecology 153:109-120.

Kays, R. W., and D. Bogan. 2003. Coyote. In Natural History of the Albany Pine Bush. New York State Museum Bulletin 502, edited by J. K. Barnes, pp. 161-162. The University of the State of New York, Albany, New York.

Kays, R. W., and D. Bogan. 2003. Fisher. In Natural History of the Albany Pine Bush. New York State Museum Bulletin 502, edited by J. K. Barnes, pp. 164. The University of the State of New York, Albany, New York.

Kays, R. W., R. A. Daniels, R. S. Mitchell, D. P. Molloy, and C. A. Siegfried. 2005. Exotic Species. In The Encyclopedia of New York, edited by P. Eisenstadt, and L.-E. Moss, pp. 538-539. Syracuse University Press, Syracuse, NY.

Kays, R. W., and DeWan, A. A. 2004. The Ecological Impact of Inside/Outside House Cats Around a Suburban Nature Preserve. Animal Conservation 7:1-11.

Kays, R. W., and Gittleman, J. L. 2001. The Social Organization of the Kinkajou Potos flavus (Procyonidae). Journal of Zoology 253:491-504.

Kays, R. W., Gittleman, J. G., and Wayne, R. K. 2000. Microsatellite Analysis of Kinkajou Social Organization. Molecular Ecology 9:743-751.

Kays, R. W., and Patterson, B. D. 2002. Mane Variation in African Lions and Its Social Correlates. Canadian Journal of Zoology 80:471-478.

Kays, R. W., and D. E. Wilson. 2002. Mammals of North America. Princeton University Press, Princeton, New Jersey.