Spring is a good time to attract more species by adding cracked corn to your bird feeders or just sprinkle on the ground. Species migrating through your yard such as juncos, sparrows, blackbirds and doves will eat it. Cardinals and Blue Jays will eat cracked corn especially when the weather warms and they do not need so such of the high fat food such as sunflower and peanuts.
Cracked corn attracts way more species than bird seed mixes that contain millet and milo. Better use of your money to just get a bag of cracked corn and mix it in with black oil sunflower or just sprinkle it alone on the ground in the morning. Don’t put it on the ground in the evening as it will become overnight food for deer and raccoons.
I have a woodland pond in my backyard so every spring I have a dozen wood ducks that walk or fly up the hill to my feeder. Putting out cracked corn is a way to feed them inexpensively. Even at the end of May, when I take down my hopper feeder and put up a single sunflower tube feeder, having some cracked corn in it still attracts the wood ducks!
Here is previous post on cracked corn as a feed additive: