South Asian river dolphin The sphincter-like structure is capable of sensing light, and may be able to sense the direction from where the light was emitted. However, the muddy waters, or low light conditions, that the "Platanista gangetica" inhabit negate the use of the little vision that remains. The Ganges subspecies shows object-avoidance behavior in both the consistently heavily murky waters of its habitat and in clear water in captivity, suggesting that it is capable of using echolocation effectively to navigate and forage for prey. However, there is limited information on how extensively vocalization is utilized between individuals. This subspecies of river dolphin is
Zoo Tycoon 2: Endangered Species 3D. "Endangered Species" contains 20 brand new animals from various countries and habitats. The expansion focuses on endangered and critically endangered animals like the Orangutan, Javan rhinoceros, Florida panther, and Giant sable antelope. However, other animals are included that are 'lower risk' and 'vulnerable' as well. "Zoo Tycoon 2"'s first expansion, "Endangered Species" updates most of the animal behaviors; basic herding behaviors were added (more advanced herding and pack behavior came out in "") and animals cannot breed with their siblings, parents or grandparents. Animal models and skins are also slightly more realistic than the animals from the original game.