Subspecies There are two distinct subspecies of American Bison and these are: Wood Bison (Bison bison athabasacae) Plains Bison (Bison bison bison) Interesting Facts American Bison are also known as: Bison American Buffalo Buffalo American Bison are one of the most recognizable animals of North America.
Quick Answer. The bull shark life cycle starts when a mother gives birth to anywhere between one and 13 babies per litter. Its gestation period lasts 10 to 11 months, according to Wildscreen Arkive, and they generally give birth between late spring and early summer. They live in estuaries, river mouths and sometimes freshwater lakes.
In fact, the female Frilled Shark has a trunk proportionately longer than that of the male, presumably to make room for developing young in a remarkably attenuate body. But what is downright astonishing is the duration of the gestation period, estimated to be as much as 42 months (3.5 years). If this is correct, the gestation period of the Frilled Shark is nearly twice as long as that of an African Elephant (22 months) and by far the longest of any vertebrate animal.