Males and females share in feeding their young, which they do every 4 to 12 minutes.

Occasionally a male and female may share a hibernating spot.

A female that moves in with an already paired male must share him with the other females.

Multiple females may lay in the one nest and share the incubation duties.

Among many bird species, males and females share nesting duties.

A male usually takes one mate, but other females may share his territory.

Adult females maintain territories, but share them with their offspring.

In some species, multiple females share a common nest, but each makes and provisions her own cells independently.

Males have black heads and tails, while the females do not share this feature.