The genus Ammodramus is a group of American sparrows in the family Emberizidae.
These birds are relatively small, with large bills, flat heads and short tails. They are usually found in grasslands or marshes and are often fairly inconspicuous. Most of their songs are insect-like.
Many of these bird species have declined in numbers due to habitat loss.
This sparrow is rarely observed because it rarely flushes and prefers to hide in the grassy meadows where it lives, but the male does sing from a higher perch.
The fact it's breast is clean white with thick, dark markings helps distinguish it from Ammodramus sparrows and the very similar Vesper Sparrow, which are the other grassland sparrows with streaks on it's breast.
This sparrow is not as shy as Ammodramus sparrows and lacks their pointy tails.