Right now the rover ants seem to be all about pupae.
I was watching a trail moving up our desert willow tree. Standing from the same position (I was on a chair),
there were ants moving pupae to the right.
And ants moving pupae to the left. These were all on the same trail. Sometimes the two groups actually bumped into each other from opposite directions.
(Pupae from another nest.)
Do you have any idea what they might have been doing?