Scientists discovered that river otter droppings contain large numbers of parasites that infect the animals’ prey, indicating that otters may play a significant role in shaping local food webs.

North American river otters eat, play and defecate in the same place. And their unhealthy habits make them ideal for detecting future health threats in the environment. Kristen Goodhue A North ...

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Every day California sea otters spend 10 to 12 hours hunting and consume nearly a third of their body weight. Suzi Eszterhas Scientists have long designated the california sea otter a “keystone ...