Sika Deer? - Dorset

Sika Deer? - Dorset

Observation - Sika Deer? - Dorset - UK and Ireland. Description: I saw these deer in Dorset, not far from RSPB's Arne reserve, and at the time assumed they were Sika Deer. But having tried to find out what the best distinction is to tell them apart from Fallow Deer I'm confused. Fallow are supposed to have more black o

I saw these deer in Dorset, not far from RSPB's Arne reserve, and at the time assumed they were Sika Deer. But having tried to find out what the best distinction is to tell them apart from Fallow Deer I'm confused. Fallow are supposed to have more black on the tail, and the deer in these photos do have a black stripe on the tail, but I'm not sure if it is black enough for Fallow or whether it is within the range of variation for Sika.

The shape and markings of the head look more like Sika to me so I've suggested that as an ID, but I'd be grateful for confirmation or otherwise.