Deer of Ireland
There are four species of deer living wild in Ireland today, namely Red Deer, Fallow Deer, Sika Deer and the recently introduced Reeve's Muntjac which is becoming established. Recently (2016), roe deer has been spotted in county Wicklow and county Armagh  The Irish Elk, or Giant Deer, and the Red Deer both became extinct in Ireland about 10,500 years ago during the Nahanagan Stadial. The Reindeer became extinct in Ireland about 9500 years ago. Many of their skeletal remains have been found well preserved in peat land.
The current Red Deer inhabitants, once thought to have been descendants from the native stock which had come to Ireland at the end of the last ice age, are now believed to have been brought from Britain across the North Channel by neolithic people around 3300 BC. They almost became extinct again in the 20th century, with only around 60 left, but have now made a comeback to approximately one thousand.
Fallow deer were introduced in Norman times, 1169 AD, and now have a population of about 10,000. Sika deer were introduced in Powerscourt park in 1860, escaped from captivity, and now number about 20,000. Scottish roe deer were introduced to the Lissadell Estate in Co. Sligo around 1870 by Sir Henry Gore-Booth. The Lissadell deer were noted for their occasional abnormal antlers and survived in that general area for about 50 years before they died out, and few roe deer currently exist in Ireland.
Native Deer species
- Red Deer - Became extinct in Ireland about 10,500 years ago.
- Irish Elk - Became extinct about 10,500 years ago.
- Reindeer - Became extinct in Ireland about 9500 years ago.
- Red Deer (reintroduced in about 3300 BC)
- Wild Deer Association of Ireland
- "Kerry red deer ancestry traced to population introduced to Ireland by ancient peoples over 5,000 years ago". Retrieved 6 November 2012.
- The roe deer by Henry Tegner 1951
- Annett, Judith A. "Deer Management in Ireland" (PDF).
Butler, F. and Keelleher, C., (eds) 2012. All-Ireland Mammal Symposium 2009. Irish Naturalists' Journal, Belfast, 90pp