Early bird is a popular term for someone who wakes up and starts their day early. There are many synonyms for early bird, including early riser, morning person, earliest worm, dawn patrol, first riser, crack of dawn, rooster, and lark. The phrase 'early riser' is the closest synonym for 'early bird', and it describes a person who wakes up early in the morning for work, exercise or any other activity. The term 'morning person' is used to describe someone who is naturally alert and productive in the morning. Meanwhile, 'dawn patrol' refers to people who start their day very early for activities such as surfing or fishing.