The bullfrog is the largest of all North American frogs, this giant can grow to a length of 8 inches (20 centimeters) or more and weigh up to 1.5 pounds (750 grams). Even the tadpoles of this species can reach 6.75 inches (17.2 centimeters) in length.

The baritone call of the bullfrog is so deep and resonant; it resembles the mooing of a cow, hence its name. Only males emit this trademark "jug-o-rum" bellow, and their choruses can be heard during the day or night.

They are among the most wide-ranging of all North American amphibians, found in ponds and streams in the farm. Bullfrog breeding begins in late spring or early summer. During that time, people can easily find the baby bullfrog, "tadpole" in the farm ponds.

Bullfrogs are typically green or gray-brown with brown spots and have easily identifiable circular eardrums, or tympanum, on either side of their heads.

The bullfrog preys on any animal it can overpower and stuff down its throat. Nocturnal predators, they will ambush and eat just about anything they can fit in their ample mouths, including insects, mice, fish, birds, and snakes. They sit quietly and wait for prey to pass by, and then lunge with their powerful hind legs, mouths open wide.

An advertisement call is the most well-known call of a frog. It is produced by a male frog in order to attract females during the breeding season and to warn other rival males of his presence. Frogs usually make the calls around bodies of water that are suitable for breeding and egg lying. These calls can be heard during the evening and at night, and sometimes during daylight at the peak of the breeding season.