Video: 'voracious'

The biologist's passion for understanding bullfrogs has never stopped, below is a short documentary from National Graphic about this creature. The video will erase our previous myths about frogs that only live on flies.

From rodents, snakes, fish, scorpions, spiders and birds, . they are like a machine that can crush anything in front. They do not have large claws or sharp teeth but still win both big and poisonous pairs.

They can swim from a distance of 20 feet to the edge of the sword and then jump back to submerge their prey into the pond with their agility. They are also carnivorous and often choose bad guys of smaller sizes as bait.

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