1) Belgian sheepdog 2) Belgian shepherd 
The Groenendael is a breed of Belgian shepherd dog developed both for herding and as a guard dog. The Groenendael has a long black coat, stands about 65 cm tall, and is protective towards its owners though wary of strangers.
[n] - black-coated sheepdog with a heavily plumed tail
noun black-coated sheepdog with a heavily plumed tail