Food habits of Metachirus nudicaudatus and Didelphis aurita were investigated through fecal analysis. Fecal samples were collected in a Restinga forest of southeastern Brazil. Both marsupials feed chiefly on soil invertebrates, while small vertebrates and fruits are eaten occasionally. D. aurita eats more fruits than M. nudicaudatus, and shows a significantly higher diversity index of invertebrates in its diet. M. nudicaudatus feeds more on arthropods, showing a narrower prey utilization than D. aurita. Resume. -Nous avons etudie le regime alimentaire de Metachirus nudicaudatus et Didelphis aurita par analyse du contenu des crottes. Les echantillons fecaux ont ete recoltes dans une foret de Restinga au sud-est du Bresil. Les deux marsupiaux se nourrissent principalement d'invertebres du sol, tandis que des petits vertebres et des fruits sont ingeres occasionnellemerit. D. aurita ingere plus de fruits que M. nudicaudatus et presente un indice de diversite de son regime alimentaire significativement superieur. M. nudicaudatus se nourrit plus d'arthropodes, et presente une utilisation de proies plus etroite que D. aurita.

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Here we present a commented list of mammals registered in the Serra da Bocaina National Park. Three field trips (February, 2010, and May and July, 2011) were accomplished along the RJ-165 highway in the Municipality of Paraty, State of Rio de Janeiro, Brazil. Forty-eight species belonging to nine orders were recorded. The local mammal fauna could be considered diverse and rich, with some species regarded as biological indicators of habitat quality. Endangered and rare rodent species like Blarinomys breviceps, Juliomys rimofrons, and Thaptomys nigrita were captured. Road and hunting impacts on mammals are discussed.

Natural diets of Didelphidae species vary in the amounts of invertebrates, fruits and small vertebrates eaten. We investigated the digestive morphology of ten species of didelphid marsupials varying in food habits. The purpose was to describe and to compare the shape and relative size of the digestive tract portions among species studied and relate them to food habits. The form of the gastrointestinal tract in this family is simple, with a unilocular stomach, small intestine, large intestine and caecum.