Birds that work together to tackle challenges may have a leg up on those that try to do so alone. This may point to why many Australian birds are so extreme in their behavior and so intelligent. They often live as residents in complex societies, establish lifelong bonds with their group mates, and have long breeding seasons, so their interactions are collectively more complex than among birds in the Northern Hemisphere, which are often migratory and live together in pairs and only for a relatively brief breeding season.
