Ummh, I (and we) have always thought that ants, bees, fleas,… never stop (working/moving). Now we know that they can take time off. But why do they rest in the open (unprotected)? What cause them to take a break? Tiredness (overworking?), lack-of-clean-air? lack-of-food (sugar/nectar)? wait-to-synchronize/wait-for-further-instruction? …A whole world in front for curious people – a life long learning can begin here. ;-)