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Table 9.29: Some of New Zealand's extinct birds and the probable causes of their extinction.
Vulnerable traits Agents of extinction
Flightless Poor fliers Ground-nesting Small bodied Small population Rat Dog Human Loss of habitat or prey
Moas X   X       ? X X h
Pelican     X   X     X  
Swan ? ? X   X   X X  
Geese X   X   X   X X X h
Finsch's duck ? X X     X     X h
Blue-billed duck     X   X X      
Musk duck     X   X X      
Chatham Is. duck   X X         X  
Haast's Eagle         X       X p
Goshawk         X?       X h, p
Snipe-rail X   X X   X      
Giant coot X   X     X X X  
Hodgen's waterhen     X X   X      
Chatham Is. Giant rail X   X         X  
Adzebill X   X     X X X X h, p
Snipe X   X X   X      
Giant owlet nightjar   X X X   X     X h, p
NZ wrens X X X X   X      
NZ raven     X         X X h, p

h = habitat loss

p = prey or carrion loss

Source: Anderson and McGlone (1992)

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