Volkmans Avian Science Super brand offers 12 species specific blends. With 150+ years of experience in blending the finest birdseed we are constantly evolving and improving to meet the demands of our customers and their companion birds. While the blends inside of the Avian Science bags have stayed nearly the same, its the improved bag quality and Carbon Dioxide flushing that make all the difference in assuring that our customers get a fresh bag of quality seed.