It is possible. However, I don't think there are any known. Given that most species are unknown, there could be one discovered. I conjecture that finding one that does both is extremely unlikely because the two life styles compete. read more
Herder ants, as their name suggest, tend to aphids — the little green bugs that drink plants’ nutrients and are considered pests by every farmer on earth, except for their own six-legged keepers. Ants love the sugary substance aphids exert and treat the bugs as their dairy cows. read more