Knowledgebase
Backyard Bird Feeding #422853
Asked August 22, 2017, 5:10 PM EDT
Marion County Oregon
Expert Response
Commercially sold "wild bird seed" mixes often contain a lot of fillers, such as milo and cracked corn, that many native wild birds just don't use - so alot of it gets kicked out on the ground. On the ground, the discarded seed can grow into weeds and also ends up supporting non-native, invasive birds such as house sparrows and starlings - which actually compete with native birds and negatively impact their populations. The discard also can turn into a food opportunity for rats, etc.
A lot of people will be happy to just keep to basic seed feeders, but other options you can add to your yard would include suet (especially in winter), hummingbird nectar, and/or Nyjer (treated thistle) seed feeders. Each of those serves an additional specialty group of birds.
Finally, because any feeder attracts use by more birds than we'd see using a single perch in nature, it's important to keep our feeders (and bird baths) clean so as to not spread disease. Audubon offers some excellent advice here http://www.audubon.org/news/3-ways-keep-your-feeder-disease-free-birds