There are about 40 species of Deer in the World.
Only three of them live in The Netherlands (in order of physical size):
1) Red Deer - Dutch: Edelhert
2) Fallow Deer - Dutch: Damhert
3) Roe Deer - Dutch: Ree
The difference between the Roe Deer and the Fallow Deer is actually quite easy: The Roe Deer doesn't have a visible tail!