Ghost ants (Tapinoma melanocephalum) and aphids living together on an eggplant in my garden. The cornicles (tail-like structures) of the aphids produce a sweet liquid called 'honeydew'. The ants harvest the honeydew, and in return protect the aphids from predators.
Canon 500D, Canon 100mm Macro USM
Couldn't include all the ants at this magnification, so had to cut a few near the edges.
Thanks, C&C awaited.