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American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
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- Contained in galleries
- American Bullfrog, Rana catesbeiana