Bullfrogs will eat almost any animal they can fit into their mouths, including amphibians, fish, mice, bats, birds, and even other bullfrogs. Both non-native fish and bullfrogs are responsible for many conservation problems, including amphibian population declines in the last 20 years.

Bullfrogs are becoming more and more common in areas where humans live. Lakes polluted by humans often have increased water temperatures and more aquatic vegetation, making them better habitats for bullfrog growth, reproduction, and escape from predators. Native species suffer because of these environmental changes as well as increased bullfrog populations.