# 13 Unique Survival Skills of Capybaras: How They Became the "Kings of the Jungle"
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11. **Immune System Resilience**
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Capybaras' immune system developed to meet different environmental demands. Many parasites and diseases that impact other mammals in their area have inherent resistance from them. Their gut flora help guard against internal parasites; their mud-bathing behaviour helps shield them from external ones. They can also safely eat plants other animals cannot because they have developed resistance to some plant poisons.