This is a dried insect larvae product that insect-eating birds will love, including: chickadees, nuthatches, titmice, robins, bluebirds, warblers, wrens and woodpeckers. These are a “made in Canada” product and have a wonderful earth-friendly story, in that these larvae are sustained and grown using recycled food products as a feed input. Nature’s Grubs are all natural and have no preservatives, stabilizers or other additives.