this is a newspaper article about the increase in population of Iberian wolves in the a region of the north of Spain, where wolves had never been exterminated and slowly recovered since protection was given (though the packs are hunted where densities are highest. The latest comprehensive census shows wolves are spreading out through other areas and where they are in low density are protected.
The regional wildlife authority suggests that the population south of the River Duero has increased enough to allow hunting and says that since population has increased where wolves are already hunted it shows that the permitted hunts are not limiting the population.
There are some areas where wolves have not increased despite the potential for it – good food sources etc.- and that needs to be investigated. The laws against leaving out dead livestock for scavengers (a big source of food for protected vultures here) has also slowed down the population increase.
So where wolves are left alone, or even hunted at low levels in a ecologically responsible manner, they can increase 20% over 13 years, and few problems between wolves and humans have been recorded (the only ones being between some farmers who have had to change some of their livestock management practices).