JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The University of Notre Dame is collaborating with JSTOR to digitize, preserve and extend access to American Midland Naturalist.ABSTRACT: Feces were analyzed to determine the food habits of coyotes (Canis latrans) in Cuyamaca Rancho State Park, San Diego Co., California. Of 748 food items identified from 223 scats, mammals made up 53 %, vegetation 23 %, arthropods 9%, reptiles 1 %, birds 1 % and miscellaneous items 3 %. Percent relative frequency of mammalian food items decreased significantly from winter (78%) to summer (52 %). Conversely percent of arthropod remains in summer scats ( 1 o%) increased significantly from winter scats (0%). Percent occurrence of vegetation in feces also increased significantly from winter (12%) to summer (22 %). Observations of coyotes did not vary significantly between seasons. These results suggest that coyotes feed opportunistically in Cuyamaca Rancho State Park.

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