Helping family is key for social birds

Social birds that forgo breeding to help to raise the offspring of other group members are far more likely to care for their own close relatives than for more distant kin, a new study has found. The study, which looked at a highly social species from outback Australia, the chestnut-crowned babbler, also found that these birds work much harder to care for their brothers and sisters than the young of less-related group members.

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