Fig. 3From: Are diurnal time-budgets and activity patterns density-dependent in the Shelduck (Tadorna tadorna) wintering in Algeria? An analysis across multiple temporal scalesPredicted curves of non-linear models testing the temporal changes in numbers of the Shelduck wintering at Sabkha Djendli (northeastern Algeria). Vertical bars represent averages of the observed data during the wintering seasons 2010‒2012. The curves of LOESS and regression splines are fitted with 95% confidence region in light greyBack to article page