Grasshopper Sparrow

Grasshopper Sparrows are one of the few North American sparrows that sings two different songs. The more common song is a dry insectlike buzz, but they also have a more musical series of squeaky notes that the male gives in flight.

Appropriately for this species, grasshoppers are the primary prey. Adults prepare grasshoppers for chicks by removing the legs of the insects, vigorously shaking them off pair by pair. Cornell All About Birds