- A-Z Animals
American Bullfrogs are mainly found in North America and Canada. They are also known as “Bullfrogs”. The members of this species are aquatic (residents of water). They are regarded as one of the most interesting frog species in the world. Read this article to know more about their appearance, distribution, habits and needs.
These frogs are of a brownish-green color with the backs marked with dark spots. The bellies are of a white or yellowish color. Sometimes black spots or vein like patterns can be noticed. They also have a pair of webbed hind legs.
The American Bullfrogs have a large, stocky appearance and are regarded as the largest among all North American frogs. They can grow anywhere from 10 to 14 inches in size. The length of the body is usually somewhere between 3.5 – 6 inches with the legs adding an extra 7- 10 inches. They can weigh up to 750 gms (1.5 pounds). The tadpoles of this species may grow 6.75 inches in length.
There are a few differences in the appearance of the male and the female frogs. These help in identifying male frogs from females. Here is information on some of these differences:
They can be found in the central and eastern regions of America. The distribution range of this species extends approximately from Nova Scotia in the north to Texas (Rio Grande River) and Central Florida in south and Colorado and New Mexico in the West. They can also be found in areas as far as Wisconsin and Rockies. It is not easy to determine the exact range of these animals. The members of this species were introduced in areas outside their natural habitat by humans in the 1920s, to use them as food. From that time, the Bullfrogs have established their habitation in areas like:
They were introduced in other far off places and even other continents like:
These creatures are aquatic and do not like to live in over populated areas.
They like to live in open, warm and sunny waters where there is enough vegetation for them to hide from any apparent danger. They need permanent ponds or other water lands as they are completely aquatic creatures and their tadpoles take more than one year to complete their transformation process.
They can occasionally be found in:
The breeding season starts in May and continues through October. The males attain adulthood somewhere between 2 and 4 years, while the females become reproductively mature when they are 3 or 4 years old.
The males call and try to attract the females during the breeding season. They become very protective of their own territory during this time. Once the mate is selected, the male and the female frogs move to the breeding spot. The reproduction takes place in water (aquatic).
Females of this species can lay as many as 20,000 eggs at a time. The eggs float in water, bound together by a jelly like substance. The fertilization of the eggs is external. After 3 to 5 days, the eggs sink underwater to hatch.
The transformation of the tadpoles starts after a few months. The transformation process takes more than a year to complete. Sometimes, a tadpole even takes three years to complete this process.
Read the following pieces of information to know about some common behaviors of this species:
The average lifespan of these frogs is 7 to 10 years. However, a particular member of this species has been known to live for 16 years.
These creatures are known to prey on any other animal they can conquer and swallow, including other Bullfrogs. Their diet consists of:
The tadpoles usually eat:
They pose a primary threat to some endangered species of frogs and reptiles like California Tiger Salamander and California Red Legged Frog. Due to this reason, the state of California is trying to control the population of Bullfrogs in their environment.
Some animals that prey on these creatures are:
Humans are also counted in this list of predators as they use these animals as a source of food. Their hind legs and backs are used for consumption.
These frogs have a deep and resonant voice and their call resembles that of a cow. This is why they are called the “Bullfrogs”. The call of the male members of this species sounds like a low and rumbling “jug- o- rum”. Their loud chorus can be heard from a great distance especially during nighttime. Sometimes, they may also call during the day.
Their adaptations make them a very powerful organism in their environment. Read on to learn about how they have adapted to survive in the wild:
Here are some interesting facts about these creatures:
These frogs are quite popular and make good pets. They are quite easy to take care of. Following are some information about keeping and feeding them:
The members of this species are included in the “Least Concern” category by the International Union for Conservation of Nature and Natural Resources (IUCN). This indicates that this species is not under any existential threat.
Are you interested to find out how these creatures look like? Here are some American Bullfrog photos for you to get an idea about the appearance of these animals.
American Bullfrogs are an exceedingly interesting species of frogs and a popular choice for pets. But, over population of these creatures may pose a threat to other threatened and endangered animals.