 From 1860, fallow deer were introduced into New Zealand.Significant herds exist in a number of low-altitude forests.One noted historical herd of fallow deer is located in the Ottenby nature reserve in Öland, where Charles X Gustav of Sweden erected a dry stone wall some 4 km long to enclose a royal fallow deer herd in the mid 17th century; the herd still exists as of 2006.