The last Ice Age ended abruptly, more or less since it is still ending, about 12,000 years ago.
You are right. The last ice age started about 100,000 years ago and ended about 10,000 years ago.
Thanks for the correction. Put mind back in gear.
Ice ages last about 50-70k years. They started about 70,000,000 years ago, so the current warm period is just one of many short- 10k years - warm periods between ice ages. We are about at the end of one of those 10k periods.
Hence all flora and fauna we have at different locations has come into being in the last 10k years either though wind, birds, the sea or migration.