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
Endangered species recovery plan common goal. An endangered species is a species which is likely to become extinct. The U.S. Fish and Wildlife Service has 17 categories of species status. These categories are used in the documents produced for the U.S. Endangered species act. The categories include: The IUCN also has categories that it uses to classify species, which are more widely used in conservation. These are: The recovery plan must contain at least: A recovery plan often contains the following sections: When recovery plans are carried out well, they do not simply act as stop gaps to prevent extinction, but can restore species