Masked crimson tanager 
Masked flowerpiercer 
Masked fruiteater 
Masked gnatcatcher 
Masked lark 
Masked laughingthrush 
Masked saltator 
Masked Shrike 
Masked tanager 
Masked tityra 
Masked water tyrant 
Masked yellowthroat 
Mayan antthrush 
Meadow Pipit 
Melodious warbler 
Menetries's warbler 
Metallic starling 
Mevess starling 
Mexican Jay 
Micronesian myzomela 
Miombo blue-eared starling 
Miombo rock thrush 
Miombo scrub robin 
Mishana tyrannulet