Apteryx australis is

Options

A. National bird of New Zealand
B. Flightless bird
C. Nocturnal
D. All the above

Answer

To answer the question "Apteryx australis is," we will analyze the options provided and confirm the characteristics of Apteryx australis, commonly known as the Kiwi.

### Step-by-Step Solution:

1. **Identify Apteryx australis**:
- Apteryx australis is the scientific name for the Kiwi, a unique bird native to New Zealand.

2. **Determine if it is the national bird of New Zealand**:
- The Kiwi is indeed recognized as the national bird of New Zealand. This is an important cultural symbol for the country.

3. **Check if it is a flightless bird**:
- Kiwis are classified as flightless birds. They have small wings and are not capable of sustained flight, which is a characteristic feature of this species.

4. **Assess if it is nocturnal**:
- Kiwis are nocturnal, meaning they are primarily active during the night. They forage for food in the dark, which is typical behavior for this species.

5. **Combine the findings**:
- Since Apteryx australis is the national bird of New Zealand, a flightless bird, and a nocturnal bird, we can conclude that all the statements about it are true.

6. **Select the correct option**:
- Therefore, the correct answer to the question is "all of the above."

### Final Answer:
Apteryx australis is the national bird of New Zealand, a flightless bird, and nocturnal. Hence, the correct option is "all of the above."

---