Foraging Ecology of a Bat Assemblage

Here I examine five non-migratory sympatric bat species that are similar in their morphology and general ecology: Eptesicus fuscus, three myotid bats, Myotis leibii, M. lucifugus, Myotis septentrionalis, and Pipistrellus (= Perimyotis) subflavus. By examining echolocation call structure, wing and jaw morphology and diet, I defined finer niche differences between species. M. lucifugus and M. septentrionalis differ in the relative abundance of moths in their diet. My results on skull morphology suggest M. lucifugus consumes harder insects than M. septentrionalis. Conversely, my data suggests M. leibii is not as efficient within a cluttered habitat but is capable of foraging in edge habitats. Eptesicus fuscus is capable of efficiently consuming larger insects whereas P. subflavus has echolocation and jaw characteristics that indicate specialization in smaller insects. Significant differences amongst these 5 species are evident based on my data of overall morphology and diet.MAS