If you love songbirds flocking to your yard or garden?and who does not?then Nyjer Thistle bird seed is exactly what you need. The special formula was designed to provide birds of all kinds a nutrient rich feed that would keep them healthy and strong. A healthy bird is a happy bird, and a happy bird keeps coming back to stay healthy. High in fatty oil content, this seed also provides a good mix of protein for soft tissue growth, fiber to keep the songbirds regular, and moisture so they stay hydrated. Moreover, the seed itself is sterile, so you do not have to worry about a non-native plant taking root and wreaking havoc in your yard or garden. Good for weeks at a time, just fill your bird feeder and change every month or so.