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Montane Forest is a downloadable biome in Zoo Tycoon 2, and the first developed usermade biome to contain multiple animals. It was first developed by Penguinman and Mikaboshi for the ZT2: Island Excursions expansion and their personal projects, and contained the animals like the Olingo and Dwarf Cassowary, and moved the existing Mountain Gorilla and Spectacled Bear to the biome.
Zoo Tycoon 2: Radical Remake created their own version, released several years later. Due to the popularity of Radical Remake, it has overtaken the original.