MacGillivray's Warbler
Magnificent Frigatebird
Magnificent Hummingbird
Magnolia Warbler
Mallard
Mangrove Cuckoo
Mangrove Swallow
Manx Shearwater
Marbled Godwit
Marbled Murrelet
Marsh Sandpiper
Marsh Wren
Masked Booby
Masked Duck
Masked Tityra
McCown's Longspur
McKay's Bunting
Merganser
Merlin
Mew Gull
Mexican Chickadee
Mexican Jay

Middendorff's Grasshopper-Warbler
Mississippi Kite
Monk Parakeet
Montezuma Quail
Moorhen
Mottled Duck
Mottled Owl
Mottled Petrel
Mountain Bluebird
Mountain Chickadee
Mountain Plover
Mountain Quail
Mourning Dove
Mourning Warbler
Mugimaki Flycatcher
Murphy's Petrel
Murre
Muscovy Duck
Mute Swan
Myna
Narcissus Flycatcher
Nashville Warbler

Nelson's Sharp-tailed Sparrow
Neotropic Cormorant
Nighthawk
Northern Beardless-Tyrannulet
Northern Bobwhite
Northern Cardinal
Northern Flicker
Northern Fulmar
Northern Gannet
Northern Goshawk
Northern Harrier
Northern Hawk Owl
Northern Jacana
Northern Lapwing
Northern Mockingbird
Northern Parula
Northern Pintail
Northern Pygmy Owl
Northern Rough-winged Swallow
Northern Saw-whet Owl
Northern Shoveler
Northern Shrike

Northern Waterthrush
Northern Wheatear
Northwestern Crow
Nuttall's Woodpecker
Nutting's Flycatcher
Oak Titmouse
Olive Sparrow
Olive Warbler
Olive-backed Pipit
Olive-sided Flycatcher
Orange-billed Nightingale-Thrush
Orange-crowned Warbler
Orchard Oriole
Oriental Cuckoo
Oriental Greenfinch
Oriental Pratincole
Oriental Scops-Owl
Oriental Turtle-Dove
Osprey
Ovenbird