Hipopótamo-pigmeu

The Zoological Society of London (ZSL) is a charity devoted to the worldwide conservation of animals and their habitats. It was founded in 1826.

The Institute of Zoology (IoZ) is the research division of the Zoological Society of London (ZSL) in England. It is a government-funded research institute specialising in scientific issues relevant to the conservation of animal species and their habitats. The Institute is based alongside London Zoo at ZSL's Regent's Park site in the City of Westminster.