He said there were a lot of ducks in the area and the small ducklings must have fallen through a grate into the drain.
Nick Boeinghoff, a Willowbank Place resident, said he was out at the time of the rescue, but had rescued several ducklings who had fallen through the grate in the past.
He said there was a population of ducks in the area and mother ducks kicked up merry hell when their offspring fell down the drain.
Footage of Titirangi firefighters extracting the ducklings from May's rescue in Green Bay appeared in media around the world, including the BBC.
The 20-minute rescue operation involved a firefighter, held by the legs, reaching into the drain to scoop out the ducklings, who were then put inside an upturned road cone before being reunited with their anxious mother at a nearby park.
People for the Ethical Treatment of Animals (PETA) Australia associate director Ashley Fruno announced the brigade would receive a Hero to Animals Award for their efforts.
"The compassion and heroism shown by members of the Titirangi Volunteer Fire Brigade are truly an inspiration. Residents of Auckland are very fortunate to have emergency service personnel who are ready to protect and serve both its human and animal residents."