The bird seed thief is checking to see if anyone would notice if he helped himself to a wee snack.
@alysonsee The battle here is against European starlings.
Next experiment is black oilseeds. American songbirds have stout beaks and can crack them open. Starlings with their soft and longer bills cannot.
@alysonsee Well, I'd expect them to come. European starlings are smarter than most birds and physically aggressive.