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In page Bangem:

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The Bangem area is home to many species of interesting birds, reptiles, amphibians, and fish as well, including the world's largest frog, the Goliath frog, the Mount Kupe bushshrike, various species of hornbills, etc. Furthermore, the nearby Lake Bermin boasts of the highest species diversity of fish as compared to the size of the lake, of any lake in the world.[citation needed] The 9 tilapia species are endemic sister species, implying sympatric speciation, making it of critical interest to conservationists and evolutionary biologists alike.