While all the rodents on the list are quite massive, the clear winner of this match is the capybara. The beaver comes in at the No. 2 spot and the cape porcupine at No. 3.

Native to South America, these gentle giants are very sociable creatures that tend to stick together. They are becoming increasingly popular among pet owners around the Americas.

The capybara is closely related to the guinea pig and more distantly related to the chinchilla. Their appearance could be described as an oversized guinea pig. The capybara has a heavy, barrel-shaped body and short head, with reddish-brown fur on the upper part of its body that turns yellowish-brown underneath.

Adults measure an average height of 2 feet tall at the withers, 4 feet long and can weigh anywhere between 75-150 pounds, although some reports say that extremely large capybaras can weigh upwards of 175 pounds. It is said that on occasion the females can be slightly heavier than the males.

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