Two types of people exist in the world: those that wake up early, and those that stay up late. The early risers, or "larks," are sometimes called "owls." Night owls can also be called "owls." There are two kinds of people: those who get up early, and those who don't. The early risers, or "larks", are sometimes called "owls," while the night owls might be called "owls." "Larks are different from owls in their natural tendencies. Larks are more energetic in mornings, while owls have more energy during the night. Circadian rhythms or our body clocks can explain these differences.