By Alex Dobuzinskis

LOS ANGELES (Reuters) - "Flight of the Conchords" star Jemaine Clement has said his offbeat HBO comedy series may not continue for a third season because it requires so much work, but a final decision will be made within a month.

Clement told Reuters that he needs to discuss the future of the show with his co-star, Bret McKenzie, and with the director of the series, James Bobin.

"It very likely might not" return for a third season, Clement said.

"It could come back in a shorter season or like a special," he added.

The largely autobiographical "Flight of the Conchords," an offbeat, cult favorite in the United States, tells of two New Zealand bandmates named Jemaine and Bret who move to New York to try to make it in the music business.

The show began in 2007 and is based on Clement and McKenzie's folk parody band Flight of the Conchords. The second season ended this past spring on the U.S. network HBO.

This year, the show gained an Emmy nomination for best comedy series, but lost to "30 Rock" on NBC. Clement also was nominated for best lead actor in a comedy series.

Clement, who took flight on a solo career last week starring in a new movie "Gentleman Broncos," said he and McKenzie are challenged to keep up with the work required for the show.

"We've got to write the series, but we've also got to write the songs, and just dividing your time into those two writing tasks is really tricky," he said.

Clement, who also told Reuters in January that Season 2 could be the last for "Flight of the Conchords," said its end would be "bittersweet" because "it's so hard" to produce.

"Flight of the Conchords" averaged 3.1 million viewers per episode last season, in-line with Season 1, HBO said.

"We've left their future entirely in their hands," said Nancy Lesser, a spokeswoman for the network. "We would love to have more, and we left an open door at HBO."

Last year, Clement and McKenzie's musical duo Flight of the Conchords won New Zealand's first Grammy since 1984, for their EP "The Distant Future." They won for best comedy album.

(Editing by Bob Tourtellotte)