Homo erectus
homo erectus: the last type of human or most closely relate to us as humans
I believe that it is homo erectus because they were the first to move out of africa. The Australopithecus's were confined to africa, even if you count Robustus. Homo habilis were contemporaries with erectus during the early erectus years, so they too were stuck in africa.
On the contrary: no species of marsupials migrate.
Species that migrate are called migratory species, while species that are accidentally introduced into an ecosystem are called invasive species.
ancestors
No. There is no species of kangaroo that migrates. None of the native mammals in Australia migrate,
Most species of birds migrate south in the winter
Monarch
no
Speciation.
Scientists can learn more about ancestors of different species and organisms by looking at fossil records and observing related species that are alive today.
Penguins do not migrate. All penguin species are native to the Southern Hemisphere.