How many possums are in New Zealand?

Answer:
There are believed to be about 66 million possums (specifically, Common Brushtail Possums) in New Zealand. They were originally introduced from neighbouring Australia for their fur, but have now become a severe environmental pest.
Note: There are comments associated with this question. See the discussion page to add to the conversation.
Contributor: Stupid
First answer by Tiercel. Last edit by On the Wallaby. Contributor trust: 2767 [recommend contributor recommended]. Question popularity: 25 [recommend question].