Mangrove Whistler 
Mangrove Yellow Warbler 
Manu antbird 
Many-colored rush tyrant 
Many-striped canastero 
Marañón crescentchest 
Marañon Gnatcatcher 
Marañón spinetail 
Marañón thrush 
Maranon tyrannulet 
Marble-faced bristle tyrant 
Marbled honeyeater 
Marcapata spinetail 
Marico flycatcher 
Marico sunbird 
Maroon-belted chat-tyrant 
Marsh Tit 
Marsh Warbler 
Marsh widowbird 
Marsh wren 
Marshalls iora 
Mascarene Martin 
Masked bowerbird 
Masked cardinal