Along with the usual small songbirds that visit my bird feeder, I sometimes host larger birds that do their best to deplete the feeder as quickly as possible.
Western Scrub-Jays will fill their crops, then fly off to hide the seeds somewhere.
This Mourning Dove camped out on the feeder for the better part of a morning. Their thin bills are not designed to crack open seeds, so they swallow their food whole.
Northern Flickers don’t crack seeds open either, so they pull all the seeds out of the feeder until they find one that is already open.
Ethical Birder 