
del Hoyo, J., Elliot, A.. Sargatal, J., 1992. Handbook of the Birds of the World, vol. 1: Ostrich to Ducks. Lynx Edicions, Barcelona, Spain.
Dunham, S., 2009. Nuts about acorns: a pilot study on acorn use in woodland period subsistence in the eastern upper peninsula of Michigan. The Wisconsin Archeologist 90: 113-130.
Finegan, E., and Stevens, E., 2008. The Digestive System of Vertebrates Website. Available at http://www.cnsweb.org/extra/digestvertebrates/AAAEdStevensINTRODUCTION.html. Accessed on June 16, 2016.
Gooder, J., 1982. Collins British Birds. William Collins Sons and Co Ltd, London.
Kurta, A., 1995. Mammals of the Great Lakes Region. University of Michigan Press, Ann Arbor, Michigan.
Lack, P. 1986. The Atlas of Wintering Birds in Britain and Ireland. T. & A. D. Poyser Ltd, Calton.
Marconi, S., Manzi, P., Pizzoferrato, L., Buscardo, E., Cerda, H., Herandez, D., Paoletti, M., 2002. Nutritional evaluation of terrestrial invertebrates as traditional food in Amazonia. Biotropica 34: 273-280.
Mullarney, K., Svensson, L., Zetterstrom, D., and Grant, P., 1999. Collins Bird Guide. Harper Collins Publishers Ltd, London.
National Geographic. 2016. Mallard Duck. Available at http://animals.nationalgeographic.com/animals/birds/mallard-duck/. Accessed on June 13, 2016.
Okayi, G., and Iorkyaa, A., 2004. Length-weight relationship and condition of freshwater shrimps Atya gabonensis and Macrobrachium felicinium from the MU River, Makurdi, Nigeria. Animal Research International 3: 153-154.
Reid, F., 2006. A Field Guide to Mammals of North America. Houghton Mifflin Company, New York.
Self Nutrition Data. Available at http://nutritiondata.self.com/facts/nut-and-seed-products/3083/2. Accessed on June 16, 2016.
Schwartz, C., and Schwartz, E., 2001. The Wild Mammals of Missouri. Second Revised Edition. University of Missouri Press, Columbia, Missouri.
Snow, D.W. and Perrins, C.M. 1998. The Birds of the Western Palearctic, Volume 1: Non-Passerines. Oxford University Press, Oxford.
Snyder, D., 1982. Tamias striatus. Mammalian Species 168: 1-8.
The IUCN Red List of Threatened Species. 2015. Available at http://www.iucnredlist.org/. Accessed on June 14, 2016.
VetSci. 2010. Comparative Digestion. Available at http://vetsci.co.uk/2010/05/14/comparative-digestion/. Accessed on June 16, 2016.
Photos (excluding ARKive photos)
http://www.bobatkins.com/photography/Gallery/New_Jersey_Wildlife/slides/chipmunk_MC0001.html
https://www.pinterest.com/pin/522065781773975043/visual-search/?x=0&y=0&w=562&h=385