The field sparrow (Spizella pusilla
) was significantly more abundant in impacted forest, and the blue-gray gnatcatcher (Polioptila caerulea) had almost equal abundance in both types of forests, but was not detected in the grassland.
The ladder-backed woodpecker (Picoides scalaris), black-crested titmouse (Baeolophus atricristatus), and field sparrow (Spizella pusilla
) decreased on the Edwards Plateau while remaining stable on Fort Hood.
Additionally, Allen & Neill (1950) found "small birds" and "field sparrows" (Spizella pusilla
?) among stomach contents, but likewise failed to quantify their observations.
Grasshopper sparrows (Ammodramus savannarum) and savannah sparrows (Passerculus sandwichensis) were observed only within airfield grasslands, whereas field sparrows (Spizella pusilla
) and song sparrows (Melospiza melodia) used NWSG areas almost exclusively.
Focal grass-shrubland species historically associated with glades, such as Bachman's sparrow (Aimophila aestivalis), prairie warbler (Dendroica discolor) and field sparrow (Spizella pusilla
) (see Probasco, 1978; Hardin et al., 1982; Thompson and DeGraaf, 2001), are Tier I species of conservation priority in the CHBCR (Fitzgerald et al., 2003).
A depredated field sparrow (Spizella pusilla
) nest was observed with one dead decapitated young, suggesting a mouse likely depredated the nest (Pietz and Granfors, 2000).
However, some bird species associated with grasslands, including the loggerhead shrike (Lanius ludovicianus, Brooks and Temple, 1990), Bell's vireo (Vireo bellii) and field sparrow (Spizella pusilla
), require woody plants for nesting habitat.
The species considered were the greater prairiechicken (Tympanuchus cupido), upland sandpiper (Bartramia longicauda), northern harrier (Circus cyaneus), dickcissel (Spiza americana), savannah sparrow (Passerculus sandwichensis), grasshopper sparrow (Ammodramus savannarum), Henslow's sparrow (Ammodramus henslowii), eastern meadowlark (Sturnella magna), red-winged blackbird (Agelaius phoeniceus), common yellowthroat (Geothlypis trichas), song sparrow (Melospiza melodia) and field sparrow (Spizella pusilla