Negatives/Cons: Wolves and other predators destroyed wildlife., Grizzly bear population increases and they attack more people than wolves do., Cattle get nervous and stop eating., Wolves wander outside of their habitat and attack livestock., Ranchers sleep less at night worrying about their livestock., Elk ate so many willow trees so beavers didn't have enough wood to build dams., Positives/Pros: Wolves improve biodiversity of an ecosystem., Ecotourists come to Yellowstone and spend money in the community., Less elk in Yellowstone allowed willow trees to grow. , No wolf has attacked a human at Yellowstone National Park.,

Wolves - Pros/Cons

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