Once known as a favorite of Cardinals, Safflower is also a lifesaver for those of you having trouble with squirrels or large nuisance birds. Since most squirrels and blackbirds dont like the bitter taste, it is an easy way to send a message to any undesirable visitors. So if youre tired of feeding more squirrels and annoying flocks of squawkers than beautiful songbirds, Safflower is definitely for you.