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Critics say their dams can flood and waterlog fields while the animals themselves can feed on certain agricultural crops and damage trees.

The men, who were standing behind trees, did as they were told.

"You wake up and suddenly you no longer see the trees. Instead, you see and hear the turbines," Mr Iguarán says.

In the park, roughly 400 trees, mostly non-native — and notoriously flammable — eucalyptuses, were considered part of the cultural historic landscape.

Although State Parks officials are “trying to retain as many as the original trees as possible” because of their historic significance, there are ongoing discussions about whether different tree species should be planted, she said.