If this bird is a Magpie Joan then you are so much more fortunate that New Zealand and Australia because Magpies here are just boring black and white, yours have so much more colour and interesting features about them.
Our Magpies have a iridescent blue sheen to the feathers.In the spring, large numbers of Magpies often gather to resolve territorial conflicts and social standing. These gatherings, called parliaments, probably gave rise to the many nursery rhymes and poems about Magpies, such as:
One for sorrow, two for mirth,
Three for a wedding, four for a birth,
Five for silver, six for gold,
Seven for a secret not to be told.
Eight for heaven, nine for hell,
And ten for the devil's own sel'
We have lots in our garden, sometimes as many as twenty gather together.....