The Philadelphia Zoo’s Michael Stern, the curator of primates and small mammals, said the zoo installed a fire hose like a tight-rope over a puddle in his enclosure so Louis could also avoid the mud.
Mr Stern said the human-like behavior is “pretty unusual” for a gorilla. Louis, who has been at the Zoo since July 2014, is a Western lowland gorilla.
The gorillas would usually only adopt the upright stance for a few seconds to reach for food or wade into swamps in the wild, the Associated Press report.
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