Is something going on with birds population in Oregon/Beaverton this year? Usually I get 20-25 species of bird in my back yard, sometime all in one day. This summer I have seen around 10 species. Also usually I put out a handful of sun flower seeds every 2-3 days, this year they hardly been touch them after 2 weeks. Suet also has not been eaten much either. Thanks for any info.
Feeder use can vary from year to year, largely dependent on conditions and availability of natural foods. I suspect your suet will get more use as our temperatures drop, which will decrease availability of small insects and other high-value foods out in the environment. Migration timing and even to some degree stop-over needs, so the species we see in our yards during spring and fall migration periods can be quite variable. Also, population abundance (and thus how many individuals might be available for us to detect) can vary quite a bit year to year, based not only on conditions and food availability here, but also what the birds can access on their other seasonal range.