After months on the move, they arrive at the northern edge of their migration, a net work of swamps and rivers, but they can't unleash their unique breeding spectacle. This is where the antelope/ lacks reform, vast fighting arenas, where gladiators duel, sometimes to the death for the right to mate. 

 

 

 

Their breeding season brief, their hormonal rage intense, they are about to dispense with ritual and get straight to the blood bleeding

 

 

 

Head butting males are conspicuous icons of the need to breed. But in the hidden world of the Costa Rican rainforest, it is the saving sisterhood of hunger that assures the success of the next generation.