What would your current location look like during the last ice age?
The entirety of my state would be covered in glaciers. The coastline would be larger, but it would still be under ice for the most part. Most of our fish descend from those that traveled north after the glaciers receded, and we have a noticeable lack of native plant diversity when compared to states that were not frozen. New England's fauna and flora assemblage basically consists of immigrants after the ice age ended, and there are very low rates of endemism here.