Using the tagline ``vote mohua, not monorail,'' Green Party co-leader and mohua campaigner Metiria Turei led the campaign for the little-known bird that now mainly lives in forest patches in Fiordland, Southland and Otago.
As well as suffering from predation and competition, the mohua's population has been reduced by habitat loss, something that will not be helped by the proposed Fiordland monorail, Mr Hackwell said.
Work has been done recently to improve the mohua's chances of survival.
Forest & Bird's southern branches were instrumental in saving a dying population of mohua in the Catlins by helping to kick start a DOC-run 1080 rat control programme.
Now mohua are thriving there, and the area has one of the largest populations of the bird.
Runners-up in the Bird of the Year poll was the ruru, which was backed by Dunedin's Tainui school, and the southern rockhopper penguin, championed by Playcentre New Zealand.
The native bird that polled most poorly was the skua.
``Maybe the reason it did so poorly is that it is a pretty cheeky generalist predator and scavenger,'' Mr Hackwell said.
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Bird of the Year 2013 - Top 10
1. Mohua (2,473)
2. Ruru (1,716)
3. Southern rockhopper penguin (1,524)
4. Kea (625)
5. Albatross (544)
6. Kakapo (396)
7. Fairy tern (380)
8. Bellbird (340)
9. Kokako (332)
10. Kaka (321)
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Bird of the Year previous winners:
2012: Karearea
2011: Pukeko
2010: Kakariki
2009: Kiwi
2008: Kakapo
2007: Grey warbler
2006: Fantail
2005: Tui
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