Lance Barrett-Lennard did, looking at echolocation differences between residents and transients, where he was able to plot the amount of echolocation activity against increasing group sizes in residents. It’s not a linear relationship at all. “So the simplest explanation for that is that the proportion of echolocation activity decreases with increasing group size, so it would suggest that not everybody is swimming around clicking independently—they’re making use of each other’s clicks. Or they’re just following the animals that are doing the clicking.
They use eachothers clicking to echolocate
