Hello! The airspeed velocity of an unladen swallow is a difficult question to answer, as it depends on the species of swallow. Generally, swallows fly at speeds between 24 and 36 miles per hour. However, some species can reach speeds up to 55 miles per hour. Additionally, the airspeed velocity of a swallow can vary depending on the weather conditions and the bird's size and weight. For example, a larger bird may be able to fly faster than a smaller one in the same conditions. Ultimately, the airspeed velocity of an unladen swallow is dependent on many factors and can vary greatly from one species to another.