Tips for using Browse:

Browsing is a valuable way to learn about birds, however it is a brute force approach and not designed for identification. A more sophisticated approach to finding a bird with specific field marks is to use the Step by Step Search. You can also try the Wizard to find a bird, which uses a question and answer approach, but again it does not give you the flexibility of the Step by Step Search.

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McKay's Bunting
McKay's Bunting: Large bunting, bright white body, black wing tips, black markings on back and tail. Large bill, legs, and feet are black. Said to be the whitest of all North American songbirds. Forages on ground. Swift flight, alternates raping wing beats with wings pulled to sides.
Mottled Petrel
Mottled Petrel: Medium-sized petrel, mostly gray with mottled white markings. Face is gray and white and, throat, upper breast, and undertail are white. Wings have distinct black bars on white undersides. Feeds on small squid and fish. Alternates high soaring arcs and gliding with rapid wing beats.
Middendorff's Grasshopper-Warbler
Middendorf's Grasshopper Warbler: Medium warbler, rust-brown upperparts, dark brown rump, white underparts with brown wash on lower breast, sides. Throat and eyestripes are white. Tail is short and white-tipped. Legs and feet are orange. Alternates rapid wing beats with wings tucked to sides.
Manx Shearwater
Manx Shearwater: Small shearwater with brown-black upperparts and white underparts, underwings and undertail coverts. Black cap is darker than back. The bill is dark. Wings are long, slim, and straight. Tail is short and pointed. Feeds on fish and squid. Alternates long glides and rapid wing beats.
Masked Booby
Masked Booby: Large seabird with white body, black trailing edge on wings, pointed black tail. Head has black mask and long, pointed, yellow bill. Legs and feet are yellow-gray. Plunge dives from 40 feet for small squid and flying fish. Alternates strong rapid wing beats with glides.
McCown's Longspur
McCown's Longspur: Medium-sized sparrow with streaked gray upperparts, plain gray underparts, and darker breast. The head has a black crown, white face and throat, and a stout, heavy bill. White tail has diagnostic black inverted T. Wings have chestnut-brown bars. Black legs and feet.
Magnificent Hummingbird
Magnificent Hummingbird: Large hummingbird of Mexican highlands, occurs in limited areas of southwest U.S. Appears very dark green overall, in good light may show blue-green to green throat, purple forehead, gray vent, small but prominent white spot behind eye; tail is all dark. Black legs, feet.
Muscovy Duck
Muscovy Duck: Large, usually domesticated duck; wild birds are dark with white wing patch that is visible in flight; domesticated birds occur in any mix of white and black. Crested head; bare face, may be black or red or a combination, has large wart-like knob at the base of the bill.
Montezuma Quail
Montezuma Quail: Odd, plump quail with short tail, complexly buff-barred and streaked dark upperparts, and heavily white spotted dark underparts divided by a wide rufous-brown stripe from breast to tail. Face is boldly patterned black and white; head has a rounded light brown crest.
Masked Duck
Masked Duck: Small stifftail duck with black-tipped blue bill and black mask with thin white eye-ring. Body is rufous-brown with black streaks on the back and sides; white wing patches are visible in flight. Feeds on aquatic plants, insects and crustaceans. Direct flight with rapid wing beats.
Mangrove Cuckoo
Mangrove Cuckoo: Medium-sized cuckoo with gray-brown upperparts, black ear patch, yellow eye-ring, white throat, and buff-washed white underparts. Long, dark tail has six large white spots underneath, each with a dark spot. Decurved bill is dark above and yellow below with a dark tip.
Mexican Chickadee
Mexican Chickadee: Small chickadee with gray upperparts, sides, and undertail coverts, black cap and bib, white cheeks, and white lower breast and belly. Wings and tail are gray. Legs and feet are gray-black. The only chickadee found in Mexico, and is vulnerable to diminishing habitat.
Mountain Chickadee
Mountain Chickadee: Medium chickadee, gray upperparts, black cap and bib, white cheeks and nape, and pale gray underparts. The wings and tail are gray. Bill is black, legs and feet are gray-black. It has a white eyebrow, which differentiates it from all other North American chickadees.
Mew Gull
Mew Gull: Medium-sized gull with gray back and upperwings, and white head, neck, breast, and belly. Bill is bright yellow. Wings have white-spotted black tips; tail is white. Feet and legs are dull yellow. Graceful, bouyant flight. Undulating, with several rapid wingbeats and a pause.
Marsh Wren
Marsh Wren: Small wren with lightly barred, warm brown upperparts, black-and-white triangular patch on upper back, and dull white underparts with pale brown sides. Crown is dark and eyebrows are white. Tail is relatively short and dark-barred. Black bill is long and slender. Legs and feet are black.
Mourning Dove
Mourning Dove: Medium-sized dove with gray-brown upperparts and pink-brown underparts. Eyes are dark with a small, black spot beneath. Bill is dark. Wings are gray-brown with black spots and dark primaries. Tail is long and pointed with black-edged white tips on outer feathers. Swift direct flight.
Marbled Godwit
Marbled Godwit: Large sandpiper with black-marked, dark brown upperparts, lightly barred, chestnut-brown underparts. Long pink bill has black tip, is slightly upcurved. Pale brown underwings visible in flight. Feeds on crustaceans, mollusks, worms, insects, seeds, berries. Swift and direct flight.
Merlin
Merlin: Small falcon with blue-gray upperparts, white to pale brown underparts with dark streaks. Throat, eye-ring, line above eye are white. Dark gray bill, cere is yellow. Tail is brown or black barred with white tips. Pacific race is dark gray. Prairie race is light gray. Taiga race is a mixture.
Mississippi Kite
Mississippi Kite: Small kite, dark gray upperparts, pale gray underparts and head. Eyes are red. Upperwings are dark gray with pale gray patches. Tail is long and black. Feeds on large flying insects. Bouyant flight with steady wing beats, alternates several wing strokes with short to long glides.
Mountain Plover
Mountain Plover: Medium-sized plover with pale brown upperparts, white underparts, and brown sides. Head has brown cap, white face, and dark eyestripe. The upperwings are brown with black edges and white bars; underwings are white. Tail is brown-black with white edges. Legs and feet are pale gray.
Magnificent Frigatebird
Magnificent Frigatebird: Large black seabird, orange throat patch inflates into a huge bright red-orange balloon when in courtship display. Long bill is gray, hooked. Wings are long and narrow. Tail is forked; legs and feet are dark gray. Eats fish, crustaceans, jellyfish. High soaring flight.
Mourning Warbler
Mourning Warbler: Medium-sized warbler with an olive-green back, wings, tail, and gray hood. The underparts are yellow and the upper breast is black. It's named for the way its dark breast and hood resemble a person in mourning. It is one of the latest spring migrants of all North American warblers.
Magnolia Warbler
Magnolia Warbler: Medium-sized warbler with dark back, yellow rump, and black-streaked yellow underparts. The head has a blue-gray crown, yellow throat, and thick white eyebrows. Wings are dark with two white bars. Tail is dark with white patches and undertail coverts. Bill, legs and feet are black.
MacGillivray's Warbler
MacGillivray's Warbler: Medium-sized warbler with olive-green upperparts and yellow underparts. White eye-ring is broken and slate gray hood extends to upper breast where it darkens to black. It forages for insects on or close to the ground. As it hops, it often flicks its tail from side to side.