Ah - you're a Monty Python Fan. What fine taste!

The airspeed velocity of an unladen swallow depends on the species of the swallow. 

There is a famous reference from the movie "Monty Python and the Holy Grail" in which the airspeed velocity of an unladen African swallow is said to be about 24 miles per hour (11 meters per second).

There are different species of swallow and their airspeed differs accordingly.

And if you need reminding of that great Monty Python scene - it's here: https://www.youtube.com/watch?v=liIlW-ovx0Y
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence