Found something. The physorg article says "They joined because they were misled into thinking that the heavy load was a juicy edible morsel that they were transporting into their nest."
That's what I assumed. The reason to persist is to bring a big piece of food back to the colony.
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https://cdn.nostrcheck.me/3875a16c978814346640ccf1c169ade71086cfdd1a2b904f46ad6591988456c9/35a91f819cd207dd246ab2cea3cd6e1f0caf5bc65da047a060634ace79a3dfc3.webp
