Grey-flanked cinclodes 
Grey-headed bushshrike 
Grey-headed canary-flycatcher 
Grey-headed honeyeater 
Grey-headed nigrita 
Grey-headed parrotbill 
Grey-headed robin 
Grey-headed tanager 
Grey-hooded babbler 
Grey-hooded bush tanager 
Grey-hooded sierra finch 
Grey-mantled wren 
Grey-necked bunting 
Grey-rumped swallow 
Grey-sided Bush Warbler 
Grey-streaked flycatcher 
Grey-tailed Piha 
Grey-throated Babbler 
Grey-throated chat 
Grey-throated leaftosser 
Grey-throated martin 
Grey-winged Inca finch 
Greyish miner 
Greyish mourner