i have swallows that hang around my hives. they fill up on bees morning and night. have had queens lost to them. i also have robins that sit on the hives and eat bees. those i can scare off with whirly gigs :-) i'd guess it's something like that.
.....The greatest changes occur in their country without their cooperation. They are not even aware of precisely what has taken place. They suspect it; they have heard of the event by chance. More than that, they are unconcerned with the fortunes of their village, the safety of their streets, the fate of their church and its vestry. They think that such things have nothing to do with them, that they belong to a powerful stranger called the government. They enjoy these goods as tenants, without a sense of ownership, and never give a thought to how they might be improved.....
Alexis de Tocqueville