Which endangered mammal of the hippopotamus family was historically recorded inhabiting the freshwater swamps of the Niger Delta?

Answer and explanation

Correct answer: D. the pygmy hippopotamus

  1. Step 1: Choeropsis liberiensis heslopi (the Niger Delta pygmy hippo) is an isolated subspecies of the pygmy hippopotamus described from the delta swamps. Step 2. Due to heavy poaching and habitat loss, it is now feared critically endangered or potentially extinct in the wild. Answer: the pygmy hippopotamus. Why not the others: Common hippos inhabit open inland rivers; giant forest hogs and red river hogs are suids.

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