 Three small populations persist isolated from each other.The former distribution of the Tehuantepec jackrabbit is not documented in detail, but it is estimated that the leporid's historic geographic range along the Mexican Pacific Coast on the Isthmus of Tehuantepec from Salina Cruz in Oaxaca to Tonalá in Chiapas, an area of perhaps only 5000 km sq.Tropical dry savannas dominated by native grasses ("Bouteloua", "Paspalum") with an overstory of sparse bushes of nanche ("Byrsonima crassifolia"), and scattered trees of morro ("Crescentia") are selected by the Tehuantepec jackrabbit.