Has anybody else noticed this behavior? My Mom used a seed mix in her feeder and noted that the birds at the feeder tended to toss certain types of seeds "overboard" and that others again (for instance, the towhees) fed on those toss-outs down on the ground. But this feeder is filled with only sunflower seeds. Yet here too, I've noticed that some birds are picky. While the green finches and nuthatches fill up a cropfull before taking off, and the blue tits and great tits grab a quick seed and then fly somewhere else to open it, the coal tits toss out seed after seed before picking the one they'll fly away with. Do they do that elsewhere as well?