Answer:
they are considered black people,but they are called aboriginals. It depends as what you define as black. If that is someone who's heritage lies within Africa then yes, a portion of Native Australians are black due to the strong genetic and linguistic links between Madagascar and many Austrolasian peoples. However, many others are of Polynesian descent, or find their heritage at a time when the Earth's population had not developed different levels in Melanin and therefore everyone was some shade of what we call black today.