Graphical Patches Endangered Species included multiple patches for the graphics of the game on the disc, and these were generally welcomed by PC gamers as the original game graphics were regarded as being somewhat poor.
Endangered Species contains 20 new animals, which vary in rarity. The expansion adds extra campaigns, items, and animals. Like all expansions, Endangered Species requires the original Zoo Tycoon 2 game installed.
Endangered Species is an expansion for Microsoft's Zoo Tycoon 2 PC game, and was the first of three released.