Fig. 1From: Quantifying the spatial and temporal distribution of tanglehead (Heteropogon contortus) on South Texas rangelandsLocation of five sites in Jim Hogg and Duval Counties in the Coastal Sand Sheet of South Texas, USA. The dark gray areas with thick boundaries represent areas covered by NAIP aerial imagery (digital orthophoto quarter quads) for each respective study site. The thin black lines outside the sites represent the county boundaries of Jim Hogg, Duval, Zapata, Brooks, and Starr counties, Texas, USABack to article page