Seemingly hard to imagine is how after Noah’s Flood could the distant continents away from the Middle East have been populated with many kinds of animals within only a few centuries. Of course seeds of plants and perhaps root balls grew from the top layers of the flood-caused sediments beginning immediately after the flood, so the big question is how did the animals and people spread out all over the world in such a short period of time? Was it really possible at all?
Animals in search of food and less competition will travel many miles in a day, and Lord knows with prolific procreation after the flood, the animals certainly set out over the seemingly limitless horizons, where plants were growing with little competition from other creatures. Keep in mind that many insects and probably amphibians survived the flood to be all over the world already at that time, so food was not a problem as the animals traveled those great distances to inhabit their geographic niches.
And humans no doubt carried with them many kinds of animals as well as plants to cultivate when they set sail during the Ice Age which followed Noah’s Flood, accurately measuring and mapping the globe by the method explained here http://genesisveracityfoundation.com/earth-measure-geometry, so by land and sea the whole world was populated with animals and people within centuries after the flood, syngameons of animals which naturally selected into what the darwinists call species today.