Christchurch street art

One of the notable characteristics of the CBD in Christchurch that I realised from my walking around the city was the amount of street art on the walls of the earthquake damaged buildings. I was also  surprised about how  good work the street art  was.  An example:

This eagle mural  (by DALeast?)  is one of the many murals that I saw around the CBD whilst I strolled around.  The quality of the work Christchurch suggested that  international artists as well as  New Zealand’s street artists.  Is that the result of street art festivals since the 2011 earthquake?