Joyful greenbul 
Jungle Babbler 
Jungle crow 
Jungle myna 
Junín Antpitta 
Junín canastero 
Junin tapaculo 
Kakamega greenbul 
Kalahari scrub robin 
Karoo chat 
Karoo eremomela 
Karoo lark 
Karoo long-billed lark 
Karoo Prinia 
Karoo thrush 
Kashmir flycatcher 
Kentucky warbler 
Kenya sparrow 
Kikuyu white-eye 
King bird-of-paradise 
Kosrae white-eye 
Krüpers nuthatch 
Kurrichane thrush 
Lacrimose mountain tanager