What is one of the primary food sources for the American kestrel during summer?

The American kestrel, a small falcon species, primarily feeds on a diverse diet, and one of its main food sources during the summer months is indeed grasshoppers. These insects are abundant in grasslands and open fields, which provide an ideal hunting ground for kestrels. Grasshoppers offer a good source of protein and are relatively easy for these birds to catch, especially during the breeding season when they need to feed their young.

While small mammals do make up a part of the kestrel's diet, they may not be as readily available or as easy to catch compared to grasshoppers in certain environments during summer. Fish are not a typical food source for the American kestrel, as they do not primarily hunt aquatic animals. Large birds are generally too big to be preyed upon by kestrels, which focus on smaller, more manageable creatures. Thus, grasshoppers stand out as a primary food source during this time, highlighting the adaptability of the American kestrel in utilizing available resources.