FIG. 6. Standardized Precipitation Index for the 6 in A Long-term Study of Home Range of Coachella Fringe-Toed Lizards, Uma inornata

FIG. 6. Standardized Precipitation Index for the 6-mo interval that encompasses winter rainfall at Palm Springs during the course of the study. Rainfall intervals were standardized against all other November through April intervals since 1927/28. An index of 0 to -0.99 indicates mild drought, -1.00 to -1.49 moderate drought, -1.50 to -1.99 severe drought, and -2.00 to -3.00 extreme drought. Positive index values indicate wet years and horizontal lines designate severe drought-year and severe wet-year thresholds.