These birds often approach very close to walkers if they pause for a minute or two in a damp area. Characteristic features are their pale breast, upright stance. They are approximately the size of a thrush - considerably larger than the tomtit, which is often mistakenly identified as a robin.
Note the leg bands. These are read from top to bottom, left leg first. So the above bird is: 'green-metal-red'
Audio file: www.whatbird.co.nz. Photograph: Maurice Colgan