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All You Can Eat: High Performance Capacity and Plasticity in the Common Big-Eared Bat, Micronycteris microtis (Chiroptera: Phyllostomidae) 1 2 3 4 2,5 Sharlene E. Santana *, Inga Geipel , Elizabeth R. Dumont , Margareta B. Kalka , Elisabeth K. V. Kalko 1 Center for Society and Genetics and Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, California, United States of America, 2 Institute of Experimental Ecology, University of Ulm, Ulm, Germany, 3 Department of Biology, University of Massachusetts, Amherst, Massachusetts, United States of America, 4 Energy and Resources Group, University of California, Berkeley, California, United States of America, 5 Smithsonian Tropical Research Institute, Balboa, Panama Abstract Ecological specialization and resource partitioning are expected to be particularly high in the species-rich communities of tropical vertebrates, yet many species have broader ecological niches than expected. In Neotropical ecosystems, Neotropical leaf-nosed bats (Phyllostomidae) are one of the most ecologically and functionally diverse vertebrate clades. Resource partitioning in phyllostomids might be achieved through differences in the ability to find and process food. We selected Micronycteris microtis, a very small (5–7 g) animalivorous phyllostomid, to explore whether broad resource use is associated with specific morphological, behavioral and performance traits within the phyllostomid radiation. We documented processing of natural prey and measured bite force in free-ranging M. microtis and other sympatric phyllostomids. We found that M. microtis had a remarkably br