What type of habitat do American Kestrels primarily prefer?

American Kestrels primarily prefer open fields and grasslands due to their hunting and nesting habits. These habitats provide the necessary open space for hunting small mammals, insects, and other prey, which are abundant in such environments. Kestrels often perch on fence posts, utility wires, or low branches to survey for food, a behavior well-suited to the visibility and accessibility found in open fields.

The structure of these habitats also supports the presence of their nesting sites, often in tree cavities or on ledges where they can seek shelter and safety. These areas offer a combination of adequate foraging opportunities and suitable nesting sites, making open fields and grasslands ideal for American Kestrels compared to other more enclosed or aquatic habitats.