Scientists tested the two hypotheses with wild colonies of acacia ants (Pseudomyrmex spinicola), which make their nests in the hollow spines of acacia trees in Panama. (sciencemag.org)
This small camp is surrounded by swathes of grassland dotted by small islands of acacia trees in one of the most scenic areas in the Okavango. (somak.com)
Elephants commonly strip the bark from acacia trees to get the sap, but the researchers found no damage on the six trees with active hives. (sciencemag.org)