Fig. 2

Acoustics and movement of pregnant and post-lactating bats. All parameters are presented for different distances from the center of the room (in bins of 0.5 m). For each bin, the mean ± SE is presented for n = 5 bats in each group. A Pregnant bats (green) used significantly higher inter-pulse intervals than post-lactating bats (pink). B Pregnant bats produced significantly longer signals. C There was no significant difference in peak frequency between the groups. D There was no significant difference in peak signal intensity between the two groups. E Pregnant bats flew at significantly lower (maximum) speeds throughout the search phase. F Pregnant bats flew at significantly lower (maximum) altitudes. The landing platform was located at ~ 110 cm above the floor. G There was no significant difference in (maximum) curvature of the flight path between the groups