Editing Callaeidae (section)

==Biology and evolution==
They are ground-dwelling songbirds, 26–38&nbsp;cm in length. They inhabit dense forests, where they feed on insects. They have strong legs and featherless [[wattle (anatomy)|wattle]]s behind the bill. Their wings are rounded and unusually weak, giving them very limited powers of flight. They are [[Monogamy in animals|monogamous]] and maintain permanent territories.<ref name=EoB>{{cite book |editor=Forshaw, Joseph|author= Lindsey, Terence|year=1991|title=Encyclopaedia of Animals: Birds|publisher= Merehurst Press|location=London|pages= 225|isbn= 1-85391-186-0}}</ref>

These birds seem to be remnants of an early expansion of [[passerines]] to New Zealand. Their only close relative is the [[stitchbird]].<ref name="Ewen ''et al.''">{{cite journal | last1 = Ewen | first1 = John G. | last2 = Flux | first2 = Ian | last3 = Ericson | first3 = Per G. P. | year = 2006 | title = Systematic affinities of two enigmatic New Zealand passerines of high conservation priority, the hihi or stitchbird ''Notiomystis cincta'' and the kokako ''Callaeas cinerea'' | journal = Molecular Phylogenetics and Evolution | volume = 40 | issue = 1| pages = 281–284 | doi = 10.1016/j.ympev.2006.01.026 | pmid=16527495|display-authors=etal}}</ref>

The phylogenetic relationships between the species shown below is based on a study published in 2022. The [[South Island saddleback]] (''Philesturnus carunculatus'') was not sampled.<ref>{{Cite journal | last1=Gibb | first1=Gillian C. | last2=Shepherd | first2=Lara D. | date=2022 | title=Recent evolution of extreme sexual dimorphism in the huia (''Heteralocha acutirostris''; Callaeidae) | journal=Molecular Phylogenetics and Evolution | volume=175 | pages=107575 | doi=10.1016/j.ympev.2022.107575}}</ref>

{{clade | style=font-size:100%;line-height:100%
|1={{Clade
   |label1='''[[Notiomystidae]]'''
   |1=''Notiomystis cincta'' – [[stitchbird]]
   |label2='''Callaeidae'''
   |2={{clade
      |label1=''[[Callaeas]]''
      |1={{clade
         |1=''Callaeas wilsoni'' – [[North Island kōkako]] 
         |2=''Callaeas cinereus'' – [[South Island kōkako]] (possibly extinct)
         }}
      |2={{clade
         |label1=''[[Philesturnus]]''
         |1=''Philesturnus rufusater'' – [[North Island saddleback]]
         |label2=''Heteralocha''
         |2=''Heteralocha acutirostris'' – [[Huia]] (extinct)
         }}
      }}
   }}
}}