What took ya so long?

I'm sitting on the couch with a cold (uhg), catching up on LJ, and there's a commotion outside at my bird feeder. About 5 birds all trying to gain access. This wouldn't be so strange, but it's the First time I've ever seen birds using it. And I've had it up there for a couple of months now... switched to pure sunflower seeds a month ago at least. Strange......