One of the more common types of bait for fishing in rivers is fly bait. It is partially what the entire outdoor sport of fly fishing is all about, but other anglers also use fly bait in certain circumstances. In fly fishing, fly bait are also called flies and they are usually hand-crafted lures that simulate the appearance of a flying insect. Although you can use actual live flies as bait if you are able to get them on a hook, bait is usually manufactured.
The conversation between using flies and actual fly bait is long and sometimes contentious. It all boils down to what style of fishing you prefer. The classic fly fishing stance of wearing waders in a wide stream or small river and flicking your pole back and forth with a loose line is very enjoyable for some anglers. Other people prefer using fly bait to cast in a more traditional manner to go after the trout and other fish hiding below the water.
This fly fishing aficionados consider tying flies to even be some sort of art form. They create fly bait from scraps of firm, threads and feathers so they look like actual insects that may be floundering in the water. Using actual bait does not include this aspect of the outdoor sport and may be more attractive to people who just want to get out there and catch some fish.