In both experiments we studied to what extent the spatio-temporal variations of passerine TD in the replicates tended to reflect the expected influence of each tested alternative manage-ment. In the Saône Valley, we hypothesized that TD in manipulated study sites across the period 2010–2014 was higher than in 2009 and than in the unmanipulated control sites over the same period. We used GLMs with TD as response variable (Gaussian distribution) and YEAR (2009 vs. 2010–2014, i.e. before and after the start of management), MANAG (presence or absence of mowing postponement in half the surface area), and the proportion of Whinchat territories (PERWH), or Corn Bunting territories (PERCB), or Yellow Wagtail territories (PERYW), as explanatory variables. The main variable of interest here was the interaction between YEAR and MANAG. In the most abundant species, possible changes over time in the proportion of territories situated within the late mown parts of the manipulated sites were also studied using binomial GLMs with YEAR as explanatory variable