Sika deer (Cervus nippon) were introduced to the UK from the Far East in 1860, while several subspecies, including Chinese, Japanese and Manchurian, were introduced into private parks, the only free-living form in Britain is the Japanese sika.
Sika deer are similar to Fallow deer in coat colour, they vary from pale yellow/brown through to red/brown with white spots in the summer months to dark grey and black in the winter. There is often a distinct dark coloured dorsal stripe running the length of the back.
Sika have a shorter tail than the Fallow and its black stripe is less distinct. There are very noticeable white glands on the hind legs of the deer and they have a distinctive white rump. The images below were taken at Studley Royal Dee Park adjoining Fountains Abbey in North Yorkshire.