Premium. Resealable. 100% Natural. Preferred Mix to Attract Cardinals, Titmice, Grosbeaks, and More.. Welcome to Nature’s Song World of Birding. Congratulations on your purchase of Nature’s Song cardinal/songbird blend. you have joined with millions of others who care for and nurture wild birds. bird feeding is a great way to invite wildlife to your home and is a hobby the whole family can enjoy.