Check the listing for details. 100% GROWN ORGANIC THISTLE SEEDS STERILIZED NO CHEMICALS (nyjer seed). Condition: New. Listed at 5.55 USD. Also commonly known as niger or thistle seed—is popular with many backyard bird species, particularly seed-eating birds and winter finches. Knowing which birds eat Nyjer can help birders choose the best birdseed and appropriate feeders for their backyardNyjer (aka thistle) seed is eagerly consumed by all the small finches—goldfinches, house, purple, and Cassin's finches, pine siskins, and redpolls. You need to offer this tiny seed in a specialized feeder of some kind.They have a good mix of protein, fat and fiber, so they're a good high-calorie option for winter birds. Bonus! Bully birds like grackles, starlings and blackbirds tend to leave nyjer seed alone. Make sure the seed stays dry, and replace uneaten food every few weeks100% Fresh & High QualityMost packages are delivered withing 1-4 days !!!