Bluegill (and other types of bream) are the most widespread and common type of sunfish. They can be found throughout the United States and these are the fish that most young anglers will target when they are learning how to fish.
Bluegill feed on insects, crustaceans, nightcrawlers, red worms, spikes, wax worms, bread and small minnows.
Nightcrawlers are larger worms, so most of the time, you are going to be using smaller pieces of these worms when targeting sunfish. They can easily grab an entire nightcrawler, but go with the smaller pieces to consistently catch sunfish.
Red worms are much smaller worms and they are the perfect size for most panfish and they are great for sunfish too.
Leeches can be very good baits for sunfish, especially if you are targeting bigger fish. The smaller leeches will do the trick. If you are fishing for lots of bites and not necessarily targeting bigger fish, try cutting the leeches into pieces. You can freeze them this way and only use what you need while on the water.
Bread is a very good bait for sunfish, however, it’s hard to keep it on the hook. Most anglers will chum with bread and then catch the bluegill with other baits, but if you can get the bread to stay on the hook long enough, you can catch plenty of sunfish with a small piece of bread.
Corn is actually a very good sunfish bait. Just rig a couple of kernels on a single hook weightless and cast it out near your favorite sunfish spot and hang on.
Spikes are perfect in size for sunfish and sunfish like to eat them. Use them on a single hook or tip your jigs, spoons and spinners with them to get more bites.
Wax worms are also a very good size for sunfish. They work great on a single hook, but most anglers use them to tip their jigs, spoons or spinners.