What Are Small Falcons Called?

What Are Small Falcons Called? The American kestrel (Falco sparverius), also called the sparrow hawk, is the smallest and most common falcon in North America. What is the smallest kind of falcon? The American Kestrel is the smallest falcon in North America. Weighing 3-6 ounces, a small kestrel weighs the same as about 34 pennies.