Frogs and bullfrogs are two completely different animals. Although they may have some similarities in name, they are different species with different appearances, ecological habits, and living habits.
frog:
Frogs, also known as "toads", are amphibians that usually live in areas near water sources, such as ponds, swamps, lakes, etc. They have wide bodies with characteristic webbed feet for swimming and living in the water. The skin of frogs is usually smooth, mostly brown or gray in color, and can undergo rapid color changes to adapt to the environment. Frogs feed on insects, worms, and other small invertebrates, and sometimes some plants.
Bullfrog:
Bullfrogs are aquatic amphibians that usually live near bodies of water, lakes, or rivers. Bullfrogs usually have green or brown spotted skin and protruding, round eyes. They feed on insects, small fish, small invertebrates, etc. Bullfrogs have long hind legs that are adapted to swimming in water and can also jump and move on land.
Differences:
Appearance: Frogs have wide bodies and webbed feet, while bullfrogs typically have flatter bodies and long hind legs.
Living environment: Frogs live near waters, such as ponds, lakes, etc.; while bullfrogs usually live in waters, such as rivers, lakes, etc.
Diet: Although they both feed on insects and small invertebrates, the details of their diet may differ between the two.
Therefore, although frogs and bullfrogs are both amphibians, they have obvious differences in their ecological habits, living habits and appearance.