When you hear crazy laser noises outside on a walk it's probably (hopefully) a tui saying hello. Sometimes you'll think you're hearing a bell bird or something, but it's just a tui mimicking them perfectly. They have an easy to spot distinctive white tuft under their throat.
They love plant nectars. We can replicate this on our porch by creating sugar water for them to enojoy. To make sugar solution, dissolve half a cup of sugar in four cups of water. The best sugar to water ratio is 1:8. Anything higher may attract bees and wasps or start to ferment more quickly.