In southern Alentejo they went on to mount the turbines despite protests about 3 families of storks in the area. They promised they would not disturb the families; They were never seen again. Been 4 years. In Algarve they cut down some trees and clean the thick brush to make up for roads and whatever. I can't remember exactly about the land mammals. I seem to remember there having problems. But what I do remember is that the turbines displaced the birds of prey on the region. Been 4 years too.
Really, the turbines have an impact on the environment. Especially for birds. But also they constitute visual pollution. But if all this seems confusing and you believe there's no impact, ask around if anyone's happy about having wind turbines planted on their national parks.