In the northern plains, most of the work of turning over soil was done by ants
prior to European settlement.
Some species form mutualistic relationships with aphids.
The aphids feed on plant sap, secreting excess sugar (called "honeydew"), which are consumed by the
In turn the ants protect the aphids from predators and may even construct mud shelters for their domesticated
Some ants are also known to feed on
Common Blue Violet
(and dispersing the seeds).