The Scotland rugby team has no nickname.
The Irish Rugby team do not as yet have a nickname
The England rugby team doesn't have an official nickname
the Canadian national rugby team is called (nickname I think) Canucks or the Maple Leafs.
The South Australian Rugby Union team have the nickname the "Black Falcons"
Strangely enough the Irish Rugby Union tean do not have a nickname.
The "Harlequins Rugby Club", a premiership rugby union team based at Twickenham Stoop in Hampstead, have been giving the nickname "quins" by their fans.