Yellow-winged Sparrow

A flat-headed, short-tailed little sparrow of the fields, the Grasshopper Sparrow may go unnoticed even when it is singing, because its song is much like the buzz of a grasshopper. The birder who learns this sound may spot the bird perched on a weed stalk or the lowest wire of a fence. When not singing, the bird stays out of sight; if disturbed it flies away low for a few yards before diving headfirst back into the grass.