The Inga tree attracts ants (in this instance, Crematogaster limata) by providing nectar in cups along their leaves. It is thought that ants benefit the plant by removing herbivores. Cayó District, Belize.
A worker Crematogaster lineolata acrobat ant carries a pupa in the brood nest. Sand Ridge State Forest, Illinois, USA
Acrobat ant with young larvae in the brood nest. Konza Prairie, Kansas, USA