Danube delta, Romania and Ukraine
The Danube delta is the second largest in Europe, (after the Volga) but it is the best preserved. 4178 square km which is 1613 square miles. Wolves are slowly returning to the delta, with the help of humans. While not obvious, wolves are likely to reduce local predation, as their presence will reduce the population of golden jackals, which have been damaging herbivore populations.