Much like the House Sparrows and Starlings in the US, in New Zealand there is a very large population of the introduced Mynas. While this bird is not unattractive, they seem to have adapted to both country living as well as in most major cities, especially on the north island and are competing for the resources of the native birds. Here are a couple pictures of the New Zealand Myna.
I caught this photo right after it caught a Praying Mantis for a snack!
The birds living in the city tend to look like they have been in street fights...and lost!!