Fig. (4) Venous blood glucose concentrations (mg dL^-1) of Titmice captured east (open square, dashed fit line) and west (filled square, solid fit line) of the Balcones Escarpment and the number of days since the last rain event. Titmice captured west of the Balcones Escarpment had relatively increased blood glucose concentrations during periods of prolonged dryness (Adj. R² east = 0.00, Adj. R² west = 0.24; whole model Adj. R² = 0.30, p <0.001).