Ear Shape
Compared to Red deer (first photograh), Dybowski Sika deer have more rounded ears that appear slightly larger.
It is also quite common for the ears to have a black rim as in the final picture of a Pure stag. Red deer also have this characteristic.
Red Deer Hind
Pure Sika Stag 12 months old
F4 Sika Hind 10 YO
F4 Sika Hind 8 YO
Pure Sika Calf
F5 Sika Stag 6 YO
Pure Sika Stag 5YO