He said the concept behind the beer was inspired by Rotorua itself.
Croucher Brewing's Julie Howard said the beer was a great spring-time celebration.
"It's sessionable enough for an afternoon around the barbecue and it's a nice celebration of the kiwi hatchling season. We're excited to give people an excuse to have a pint and do some good at the same time."
A portion of each keg sold nationally will be donated back to the Rainbow Springs Kiwi Encounter and the North Island Brown Ale will be featured at the weekend's Pacific Beer Expo in Wellington, after which it will be available for national distribution. North Island Brown is a limited release and available in kegs only.
The Kiwi Encounter at Rainbow Springs is New Zealand's largest and most successful kiwi conservation centre, having hatched and nurtured more than 1350 eggs since 1995.
-Visit www.kiwisforkiwi.org for more information about how you can help save the kiwi from extinction.