Visit the docks in Auckland, New Zealand, on any day of the week and you might just see Piri puttering around, clad in a smart orange vest and going about her work with the utmost professionalism. Observe as she wanders to some bags and does a thorough search, before clambering aboard a barge to take a good sniff around.

Piri works for the New Zealand government in the Department of Conservation .

She also happens to be a dog.