I am a blogger self employer Fleas are more like lice than bedbugs. They are almost the same size. The big difference is that fleas and lice have different colors. Fleas are black or dark brown, while lice are light brown. Other bloodsucking pests, such as ticks, look nothing like lice. They are much larger. Like insects, they do not live in their host. They bury their heads under the skin for food, which lice do not.