What is the airspeed velocity of an unladen swallow?

The airspeed velocity of an unladen swallow is often estimated to be around 24 mph (or 11 meters per second). This approximation is based on the average flight characteristics of various species of swallows, taking into account their wing size, body mass, and energy expenditure. However, it's important to note that the precise airspeed velocity can vary based on factors such as wind speed, weather conditions, and individual differences among birds.