Maternal Orca Defense: Older Moms Protect Sons in Fierce Battles
A study from the University of Exeter suggests that orca mothers who have gone through menopause defend their adult male offspring in fights, potentially to ensure the passing on of their genes. The research found that male orcas swimming with their older mothers have fewer wounds, indicating maternal protection. This behavior is unique to killer whales, as they have a social structure that promotes long-lasting relationships between mothers and sons. Female orcas can live up to 20 years after menopause, making this life change rare among mammals.