What am I?

Cover the clues so you can only see number one. How many clues do you need before you know the answer?

1. I can fit into a briefcase.

2. I was found in Pukekura Park but this was a most unusual find.

3. I am usually found in other countries the closest of which is Australia.

4. For a while there people were worried because my kind is not wanted in New Zealand.

5. This is only part of me and I was probably put in the park as a hoax.

Answer in the next TreasureLink.