Falco sparverius, commonly known as the American Kestrel, is native to the Americas. Its geographical distribution extends from Alaska and Canada in North America, through the United States and Mexico, and into Central and South America, reaching as far south as Tierra del Fuego in Argentina. It is one of the most widespread and adaptable raptor species in the Western Hemisphere.

The American Kestrel inhabits a variety of environments, ranging from open fields and grasslands to deserts, savannas, and urban areas. It prefers areas with abundant open spaces for hunting, and can often be found in areas near human development where fields or grasslands are present. The kestrel generally avoids dense forests and tundras.

The ecological niche of the American Kestrel includes being a small predator at the top of its food chain within its specific size range, primarily preying on insects, small mammals, and birds. It plays a crucial role in controlling populations of these species. The kestrel is well-adapted to a wide range of habitats due to its flexible diet and nesting behavior, often utilizing tree cavities, rock crevices, or man-made structures for nesting. Its presence across a diverse set of climates—from temperate to tropical—demonstrates its adaptability.