Which of the following is a native bird of New Zealand?

The kea is indeed a native bird of New Zealand, specifically known for its intelligence and playful behavior. This large parrot is unique to the country's mountainous regions and is easily recognizable by its olive green feathers, orange underwings, and curious nature. The kea's ability to adapt to various environments and its playful interaction with tourists make it a notable symbol of New Zealand wildlife.

In contrast, the other bird options, such as the pigeon, eagle, and seagull, may have populations in New Zealand, but they are not classified as native to the country. For instance, while the New Zealand pigeon (or kererū) is native, the generic term "pigeon" can refer to various species, not all of which are native to New Zealand. Similarly, the eagle and seagull often refer to species that are commonly found worldwide and do not hold the same native status within New Zealand's unique ecosystem. Therefore, the kea stands out as a clear representative of New Zealand's diverse avian life.