The juncos in my yard somehow learned how to use the feeder about 3. years ago. The first couple of years, they only used the seed feeder. This year, they also use the suet and the peanut feeder.
Also, I've always had song sparrows, but they never used the feeders, either. This winter, I have one with no tail (!) that is using the seed feeder.
I wonder if the juncos are passing it along within the population as a new skill...
Jim Guion
Arlington