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Relationship between proportion of time southern pied babblers T. bicolor spent incubating on cool (Tmax < 35.5°C, open circles, dashed lines, dotted 95% CIs) and hot (Tmax ≥ 35.5°C, open triangles, solid lines, dashed 95% CIs) days on the (a) daily energy expenditure and (b) water balance of incubating birds with the line showing the model fit and dashed lines representing 95% confidence interval; model fit lines for non-significant relationships are faded to grey.
