The American bullfrog (Lithobates catesbeinanus) is an inasive species in British Columbia. An invasive species is a non-native species that can rapidly increase in population size as it has no natural predators in the area. The American bullfrog poses a threat to the populations of native amphibian species in the Kootenay Region by outcompeting them for food and resources, but also by preying on them. This study analyzes the stomach contents of American bullfrogs collected from Lomond Lake BC, to determine if American bullfrogs are preying on native amphibians in the Kootenay Region. Stomach contents were analyzed and classified to isolate what the most common prey of bullfrogs are, and to look for presence the of amphibians. Of the 35 specimens dissected, no amphibians were found in the stomach contents. The predominant prey found were insects. It is speculated that no amphibians were found due to the smaller mean size (length and weight) of the bullfrogs sampled, when compared to the size of bullfrogs in studies that found amphibians in stomach contents. Going forward, the bullfrog populations in the Kootenay Region should continue to be monitored as they have the potential to negatively impact native amphibian species.
