Bird feeders are monopolized by dominant birds. You minimize this by keeping your feeder full. Refill your feeder in the evening when the sun is going down and there’s still daylight, but the birds are all nested. You know this because you don’t see any birds, or hear any chirping.
When you place a bird feeder near a nest(s), those birds will consider that feeder theirs. But if there is always more-than-enough, they will share with other species & neighbors. Of course, bigger birds will find any feeder & help themselves.
People debate the question of a glass being half-full or half-empty, but birds don’t. Birds always consider the feeder “half empty” when it gets down to the midpoint. That’s when the dominators get MUCH more protective of their food stash.
Plastic bird feeders, like the one shown above, trap moisture which causes the seed to dissolve & clump at the bottom. If you are mobile & busy, a $40 hangable screen feeder is ideal just about anywhere.
I prefer the model with a tension pin to hold the cap tight. If you hang it on a good hook, you will get little-to-no spillage even in high winds. Furthermore, rodents can’t lift the lid off a screen feeder when it is tension-pinned. A squirrel is a rat with a bushy tail. With that said, I’m with Milton Waddams in Office Space (1999), I like the squirrels.
Anyways, if you hang & maintain a screen feeder in a good spot it will attract sparrows, cardinals, and any other seed-eating species for miles around. A “good spot ” is somewhere you can comfortably view it from inside, and easily access it to refill. If you dump the seed, the squirrels will get it all. Bird feeding is easier than pet ownership, while keeping you connected with animals & nature.
I recommend a ‘songbird blend’ as feed, available at Walmart, etc. This gets you more variety, which is the name-of-the-game in bird watching. You’ll even get an occasional hummingbird who is curious & hopeful, attracted by all the bird activity. Bigger birds come by and pick out the stuff they don’t want, to get to the stuff they DO want, which leads to a frenzy of sparrows on the ground where all the discarded seed falls. I like the birds.