Giant frogs are the largest on Earth by Cyril Ruoso/Minden Pictures (4 images)

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These giant frogs are the largest on Earth and weigh as much as a newborn baby - but sadly face extinction because of poachers who hunt them for the exotic pet market. The aptly named 'goliath frogs' are endemic to the fast-moving freshwater rivers in Cameroon and Equatorial Guinea.

The frogs, which are as large as an average frog when they are tadpoles, can grow up to 32cm (12.6 inches) in length and can weigh up to 3.25kg. However the goliath frogs are endangered because...
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