Ammodramus

The genus Ammodramus is a group of American sparrows in the family Passerellidae. Ammodramus is Latin for "Sand Runner." Typical of these thick grass and ground loving sparrows.

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. Most species are found in eastern North America, while the Grassland and Yellow-browed Sparrows are found in South America

Many of these bird species have declined in numbers due to habitat loss.

The full list of species is:
 * Grasshopper Sparrow, Ammodramus savannarum
 * Grassland Sparrow, Ammodramus humeralis
 * Yellow-browed Sparrow, Ammodramus aurifrons

Ammospiza

 * Seaside Sparrow, Ammospiza maritimus
 * Dusky Seaside Sparrow, Ammospiza maritimus nigrescens (extinct, 1987)
 * Cape Sable Seaside Sparrow, Ammospiza maritimus mirabilis
 * Nelson's Sparrow, Ammospiza nelsoni
 * Saltmarsh Sparrow, Ammospiza caudacutus
 * Le Conte's Sparrow, Ammospiza leconteii

Nemospiza

 * Henslow's Sparrow, Nemospiza henslowii

Centroynx

 * Baird's Sparrow, Centronyx bairdii

The fossil Ammodramus hatcheri (Late Miocene of Kansas, USA) was formerly placed in genus Palaeospiza or Palaeostruthus. The former may not be a passeriform at all, while the latter was eventually synonymized with Ammodramus as A. hatcheri scarcely differs from the living species.