Records of preys hunted by the Zeledon's Mouse Opossum Marmosa zeledoni Goldman, 1911 (Didelphimorphia: Didelphidae) in Costa Rica

There is relatively limited information about the feeding behaviors and ecology of mouse opossums (Marmosa), due to the difficulty of observing these elusive nocturnal species in dense tropical forest settings. Herein we reviewed the known diet for the Zeledon's Mouse Opossum Marmosa zeledoni and related species. Additionally, we report three previously unknown prey items documented during field observations at La Selva Biological Station and Alberto Manuel Brenes Biological Reserve, Costa Rica: a cicada, a katydid and a robber frog (Craugastor crassidigitus). This note compiles the scarce information on natural history for mouse opossums, and provides the first photographic evidence about the role of these elusive Neotropical marsupials as active predators of insects and frogs.