They are among about 10 percent of primate species considered biparental, with both sexes sharing the work.

Both sexes shared the decision-making process in terms of changing group activity.

Both sexes share incubation of the eggs and care for the young.

If the sexes share a space, men are usually in the front rows and women in the back, sometimes separated by a partition.

Both sexes shared the dining and meeting rooms, but sat on opposite sides of the room.

Both sexes share the task of building the nest, incubating the eggs and caring for the young.

While the status of men is considered higher than that of women, the sexes share responsibilities in the house and the family.

But there are other sources, and both sexes share the chemical, albeit to differing degrees.

The two sexes would then share the spoils.

Both sexes share nest-building and feeding young; female alone incubates for about 19 days until the eggs hatch.