Rhys Darby is from New Zealand. He’s our favorite thing to come out of New Zealand since ... okay, so we can’t remember the last thing from New Zealand that we ran out to see/buy/hear/taste. So as far as we’re concerned, Darby is an accidental ambassador for Kiwi cultural life. Best known for his portrayal of Murray, the incompetent band manager on HBO’s Flight of the Conchords, Darby does a mean beat box and a spot-on impression of a helicopter propeller, and he can channel a tyrannosaurus so well that you’ll think you’ve crawled through a wormhole to Jurassic Park. Don’t expect a crash course in an exotic nation’s history when he appears tonight at 7 p.m. at the Wilbur Theatre (246 Tremont Street, Boston. 617.248.9700). Do expect tales of a less-than-idyllic boyhood, disclosure of mermaid fantasies, and plenty of laughs. Tickets ($25) are available at www.ticketmaster.com or 617.931.2000.