Nyjer Often called “thistle” seed, nyjer is not related to North American thistle plants but comes from the Guizotia abyssinica plant native to Africa. This imported seed has become increasingly popular in recent years, largely due to its ability to attract finches including American Goldfinch, Pine Siskin, and Common Redpoll. Because nyjer seed is so small it requires a special feeder with very small feeding ports. The small openings on the feeding ports will prevent the seed from falling on the ground. To prevent waste, it is best to feed nyjer seed by itself (rather than in a mix). Seeds are heat-treated prior to importation to prevent sprouting.