Mark Moffett / Ant (Pseudomyrmex sp) group drink nectar from Whistling Thorn (Acacia drepanolobium) acacia tree and protect the tree from leaf eating enemies ensuring mutual survival, Costa Rica

Mark Moffett / Ant (Pseudomyrmex sp) tends pupa, while larvae at right, eats carrot-like growth from host Acacia

Mark Moffett / Ant (Pseudomyrmex sp) gathers carrot-like growths from Whistling Thorn (Acacia drepanolobium) acacia tree for delivery to larva in nest, in return for baby food, ant protects Acacia, Costa Rica

Mark Moffett / Ant (Pseudomyrmex sp) gathers carrot-like growths from Whistling Thorn (Acacia drepanolobium) acacia for delivery to larva in nest, in return for baby food Ant protects Acacia, Costa Rica

Ingo Arndt / Ant (Pseudomyrmex sp) making home in acacia thorn in return protecting the plant from herbivores, Costa Rica

Phil Savoie / Acacia ant {Pseudomyrmex sp} on Bulls horn acacia. Belize

Piotr Naskrecki / Ant (Pseudomyrmex nigrocinctus) collecting beltian bodies from young leaves of Acacia to feed their larvae, Costa Rica

Piotr Naskrecki / Acacia Ant (Pseudomyrmex flavicornis) collecting beltian bodies from young leaves of Acacia to feed their larvae, Costa Rica

Piotr Naskrecki / Acacia Ant (Pseudomyrmex flavicornis) worker enters hollowed out spine of Bullhorn Acacia that serves as breeding chamber and shelter, Costa Rica

Piotr Naskrecki / Acacia Ant (Pseudomyrmex flavicornis) collecting nectar from petiole at the base of Bullhorn Acacia leaf, Costa Rica

Phil Savoie / Acacia ant {Pseudomyrmex sp} on Bull thorn acacia spine. Symbiosis, Central America

Neil Lucas / Acacia ants (Pseudomyrmex sp.) making home in acacia thorn