Red-breasted Nuthatches climb up and down the trees before flying over for a sunflower seed. Red-shafted flickers with their brilliant coral underwings as well as a Whiteheaded woodpecker are regular visitors. A flock of five Band-tailed pigeons took flight from the feeders the other morning when I arose. A pair of Sierra chickadees and small brown squirrels gambol and chase each other around our trees, and also visit the feeders. They let us approach them within a few feet.
Squirrels can be pests at bird feeders.
Having at least one squirrel-proof feeder is a good idea. If you enjoy cross country skiing, you may have an opportunity to hand-feed chickadees if you carry along some sunflower seeds in your pockets. Starlings and house sparrows, both introduced from Europe, have seriously taken over nesting sites of numerous native birds. In summer, I put up hummingbird feeders and feeders of sunflower seeds for smaller birds. Late in fall, when temperatures drop again and the undesirables depart, I replace the large feeders.