Pine Siskins at feeders

I’ve read descriptions of American Goldfinches and Pine Siskins eating through bags of thistle seed in one winter season but never experienced it myself. Before I left for a winter vacation in early December I’d seen a lone Pine Siskin at the feeder. The first one seen here in four years. I return to find a large group of Pine Siskins have taken over the feeders. I’ll be buying more food before January is half through. I counted 23 at one time this morning.