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
Protogoniomorpha parhassus with black. There are black spots near the margins of both the forewings and hindwings. The underside of the wings has a greenish-white base colour, with eyespots corresponding to those on the upper surface. This species lays tiny eggs similar to those of "Junonia" and "Precis" species. The larvae are similar to those of "Junonia" and "Precis" species, but larger. They feed on "Asystasia" ("A. gangetica"), "Brillantaisia", "Isoglossa" ("I. woodii" and "I. mossambicensis" ), "Mimulopsis", and "Paulowilhelmia" species. The pupae are similar to those of "Junonia" and "Precis" species, but larger. The flight period of the adults is year round,