Mountain Bluebird 
Mountain Bulbul 
Mountain Cacique 
Mountain chickadee 
Mountain Elaenia 
Mountain firetail 
Mountain Fulvetta 
Mountain greenbul 
Mountain leaf warbler 
Mountain tailorbird 
Mountain wagtail 
Mountain wheatear 
Mountain Wren 
Mourning sierra finch 
Mourning warbler 
Mourning wheatear 
Mouse-colored antshrike 
Mouse-coloured penduline tit 
Moussiers Redstart 
Moustached antpitta 
Moustached Antwren 
Moustached brush finch 
Moustached flowerpiercer 
Moustached turca