Flutter ponies are the ancestors of Breezies. They used to be the size of normal ponies, but over the years they evolved into the much smaller species they are now.
“I’ve heard a lot of stories about pony ancestors. I wonder if Flutter ponies came from the lands they talk about in the Hearth’s Warming Eve tale, or if they were native to Equestria before we came here…”
“Sometimes I wonder what it must be like for Luna and Celestia. I mean, they lived so much. It must be fascinating to have seen things we’ve only been able to read about.”