Birds of Maryland: The Official State Checklist

All 477 birds on the list

Part 1: Species (456)

• Black-bellied Whistling-Duck Dendrocygna autumnalis
• Fulvous Whistling-Duck Dendrocygna bicolor
• Snow Goose Anser caerulescens
• Ross's Goose Anser rossii
• Greater White-fronted Goose Anser albifrons
• Pink-footed Goose Anser brachyrhynchus
• Brant Branta bernicla
• Barnacle Goose Branta leucopsis
• Cackling Goose Branta hutchinsii
• Canada Goose Branta canadensis
• Mute Swan Cygnus olorInvasive
• Trumpeter Swan Cygnus buccinator
• Tundra Swan Cygnus columbianus
• Wood Duck Aix sponsa
• Blue-winged Teal Spatula discors
• Cinnamon Teal Spatula cyanoptera
• Northern Shoveler Spatula clypeata
• Gadwall Mareca strepera
• Eurasian Wigeon Mareca penelope
• American Wigeon Mareca americana
• Mallard Anas platyrhynchos
• American Black Duck Anas rubripes
• Northern Pintail Anas acuta
• Green-winged Teal Anas crecca
• Canvasback Aythya valisineria
• Redhead Aythya americana
• Ring-necked Duck Aythya collaris
• Tufted Duck Aythya fuligula
• Greater Scaup Aythya marila
• Lesser Scaup Aythya affinis
• King Eider Somateria spectabilis
• Common Eider Somateria mollissima
• Harlequin Duck Histrionicus histrionicus
• Surf Scoter Melanitta perspicillata
• White-winged Scoter Melanitta deglandi
• Black Scoter Melanitta americana
• Long-tailed Duck Clangula hyemalis
• Bufflehead Bucephala albeola
• Common Goldeneye Bucephala clangula
• Barrow's Goldeneye Bucephala islandica
• Hooded Merganser Lophodytes cucullatus
• Common Merganser Mergus merganser
• Red-breasted Merganser Mergus serrator
• Masked Duck Nomonyx dominicus
• Ruddy Duck Oxyura jamaicensis
• Northern Bobwhite Colinus virginianus
• Wild Turkey Meleagris gallopavo
• Ruffed Grouse Bonasa umbellus
• Greater Prairie-Chicken (Heath Hen) Tympanuchus cupido cupido
• Ring-necked Pheasant Phasianus colchicusNonnative
• American Flamingo Phoenicopterus ruber
• Pied-billed Grebe Podilymbus podiceps
• Horned Grebe Podiceps auritus
• Red-necked Grebe Podiceps grisegena
• Eared Grebe Podiceps nigricollis
• Western Grebe Aechmophorus occidentalis
• Rock Pigeon Columba livia
• Eurasian Collared-Dove Streptopelia decaocto
• Passenger Pigeon Ectopistes migratorius
• Inca Dove Columbina inca
• Common Ground Dove Columbina passerina
• White-winged Dove Zenaida asiatica
• Mourning Dove Zenaida macroura
• Groove-billed Ani Crotophaga sulcirostris
• Yellow-billed Cuckoo Coccyzus americanus
• Black-billed Cuckoo Coccyzus erythropthalmus
• Common Nighthawk Chordeiles minor
• Chuck-will's-widow Antrostomus carolinensis
• Eastern Whip-poor-will Antrostomus vociferus
• Chimney Swift Chaetura pelagica
• Mexican Violetear Colibri thalassinus
• Ruby-throated Hummingbird Archilochus colubris
• Black-chinned Hummingbird Archilochus alexandri
• Anna's Hummingbird Calypte anna
• Calliope Hummingbird Selasphorus calliope
• Rufous Hummingbird Selasphorus rufus
• Allen's Hummingbird Selasphorus sasin
• Clapper Rail Rallus crepitans
• King Rail Rallus elegans
• Virginia Rail Rallus limicola
• Corn Crake Crex crex
• Sora Porzana carolina
• Common Gallinule Gallinula galeata
• American Coot Fulica americana
• Purple Gallinule Porphyrio martinicus
• Yellow Rail Coturnicops noveboracensis
• Black Rail Laterallus jamaicensis
• Limpkin Aramus guarauna
• Sandhill Crane Antigone canadensis
• Black-necked Stilt Himantopus mexicanus
• American Avocet Recurvirostra americana
• American Oystercatcher Haematopus palliatus
• Northern Lapwing Vanellus vanellus
• Black-bellied Plover Pluvialis squatarola
• American Golden-Plover Pluvialis dominica
• Killdeer Charadrius vociferus
• Semipalmated Plover Charadrius semipalmatus
• Piping Plover Charadrius melodus
• Wilson's Plover Charadrius wilsonia
• Snowy Plover Charadrius nivosus
• Upland Sandpiper Bartramia longicauda
• Whimbrel Numenius phaeopus
• Eskimo Curlew Numenius borealis
• Long-billed Curlew Numenius americanus
• Hudsonian Godwit Limosa haemastica
• Marbled Godwit Limosa fedoa
• Ruddy Turnstone Arenaria interpres
• Red Knot Calidris canutus
• Ruff Calidris pugnax
• Sharp-tailed Sandpiper Calidris acuminata
• Stilt Sandpiper Calidris himantopus
• Curlew Sandpiper Calidris ferruginea
• Red-necked Stint Calidris ruficollis
• Sanderling Calidris alba
• Dunlin Calidris alpina
• Purple Sandpiper Calidris maritima
• Baird's Sandpiper Calidris bairdii
• Little Stint Calidris minuta
• Least Sandpiper Calidris minutilla
• White-rumped Sandpiper Calidris fuscicollis
• Buff-breasted Sandpiper Calidris subruficollis
• Pectoral Sandpiper Calidris melanotos
• Semipalmated Sandpiper Calidris pusilla
• Western Sandpiper Calidris mauri
• Short-billed Dowitcher Limnodromus griseus
• Long-billed Dowitcher Limnodromus scolopaceus
• American Woodcock Scolopax minor
• Wilson's Snipe Gallinago delicata
• Spotted Sandpiper Actitis macularius
• Solitary Sandpiper Tringa solitaria
• Lesser Yellowlegs Tringa flavipes
• Willet Tringa semipalmata
• Greater Yellowlegs Tringa melanoleuca
• Wilson's Phalarope Phalaropus tricolor
• Red-necked Phalarope Phalaropus lobatus
• Red Phalarope Phalaropus fulicarius
• Great Skua Stercorarius skua
• South Polar Skua Stercorarius maccormicki
• Pomarine Jaeger Stercorarius pomarinus
• Parasitic Jaeger Stercorarius parasiticus
• Long-tailed Jaeger Stercorarius longicaudus
• Dovekie Alle alle
• Common Murre Uria aalge
• Thick-billed Murre Uria lomvia
• Razorbill Alca torda
• Black Guillemot Cepphus grylle
• Atlantic Puffin Fratercula arctica
• Black-legged Kittiwake Rissa tridactyla
• Sabine's Gull Xema sabini
• Bonaparte's Gull Chroicocephalus philadelphia
• Black-headed Gull Chroicocephalus ridibundus
• Little Gull Hydrocoloeus minutus
• Ross's Gull Rhodostethia rosea
• Laughing Gull Leucophaeus atricilla
• Franklin's Gull Leucophaeus pipixcan
• Black-tailed Gull Larus crassirostris
• Common Gull Larus canus
• Ring-billed Gull Larus delawarensis
• California Gull Larus californicus
• Herring Gull Larus argentatus
• Yellow-legged Gull Larus michahellis
• Iceland Gull Larus glaucoides
• Lesser Black-backed Gull Larus fuscus
• Glaucous Gull Larus hyperboreus
• Great Black-backed Gull Larus marinus
• Kelp Gull Larus dominicanus
• Sooty Tern Onychoprion fuscatus
• Bridled Tern Onychoprion anaethetus
• Least Tern Sternula antillarum
• Gull-billed Tern Gelochelidon nilotica
• Caspian Tern Hydroprogne caspia
• Black Tern Chlidonias niger
• Roseate Tern Sterna dougallii
• Common Tern Sterna hirundo
• Arctic Tern Sterna paradisaea
• Forster's Tern Sterna forsteri
• Royal Tern Thalasseus maximus
• Sandwich Tern Thalasseus sandvicensis
• Black Skimmer Rynchops niger
• White-tailed Tropicbird Phaethon lepturus
• Red-billed Tropicbird Phaethon aethereus
• Red-throated Loon Gavia stellata
• Pacific Loon Gavia pacifica
• Common Loon Gavia immer
• Yellow-nosed Albatross Thalassarche chlororhynchos
• Wilson's Storm-Petrel Oceanites oceanicus
• White-faced Storm-Petrel Pelagodroma marina
• Leach's Storm-Petrel Hydrobates leucorhoa
• Band-rumped Storm-Petrel Hydrobates castro
• Northern Fulmar Fulmarus glacialis
• Trindade Petrel Pterodroma arminjoniana
• Black-capped Petrel Pterodroma hasitata
• Zino's/Fea's Petrel Pterodroma madeira/feae
• Cory's Shearwater Calonectris diomedea
• Sooty Shearwater Ardenna grisea
• Great Shearwater Ardenna gravis
• Manx Shearwater Puffinus puffinus
• Audubon's Shearwater Puffinus lherminieri
• Wood Stork Mycteria americana
• Magnificent Frigatebird Fregata magnificens
• Masked Booby Sula dactylatra
• Brown Booby Sula leucogaster
• Northern Gannet Morus bassanus
• Anhinga Anhinga anhinga
• Great Cormorant Phalacrocorax carbo
• Double-crested Cormorant Nannopterum auritus
• Neotropic Cormorant Nannopterum brasilianus
• American White Pelican Pelecanus erythrorhynchos
• Brown Pelican Pelecanus occidentalis
• American Bittern Botaurus lentiginosus
• Least Bittern Ixobrychus exilis
• Great Blue Heron Ardea herodias
• Great Egret Ardea alba
• Snowy Egret Egretta thula
• Little Blue Heron Egretta caerulea
• Tricolored Heron Egretta tricolor
• Reddish Egret Egretta rufescens
• Cattle Egret Bubulcus ibis
• Green Heron Butorides virescens
• Black-crowned Night-Heron Nycticorax nycticorax
• Yellow-crowned Night-Heron Nyctanassa violacea
• White Ibis Eudocimus albus
• Glossy Ibis Plegadis falcinellus
• White-faced Ibis Plegadis chihi
• Roseate Spoonbill Platalea ajaja
• Black Vulture Coragyps atratus
• Turkey Vulture Cathartes aura
• Osprey Pandion haliaetus
• White-tailed Kite Elanus leucurus
• Swallow-tailed Kite Elanoides forficatus
• Golden Eagle Aquila chrysaetos
• Northern Harrier Circus hudsonius
• Sharp-shinned Hawk Accipiter striatus
• Cooper's Hawk Accipiter cooperii
• Northern Goshawk Accipiter gentilis
• Bald Eagle Haliaeetus leucocephalus
• Mississippi Kite Ictinia mississippiensis
• Red-shouldered Hawk Buteo lineatus
• Broad-winged Hawk Buteo platypterus
• Swainson's Hawk Buteo swainsoni
• Red-tailed Hawk Buteo jamaicensis
• Rough-legged Hawk Buteo lagopus
• Barn Owl Tyto alba
• Eastern Screech-Owl Megascops asio
• Great Horned Owl Bubo virginianus
• Snowy Owl Bubo scandiacus
• Burrowing Owl Athene cunicularia
• Barred Owl Strix varia
• Long-eared Owl Asio otus
• Short-eared Owl Asio flammeus
• Northern Saw-whet Owl Aegolius acadicus
• Belted Kingfisher Megaceryle alcyon
• Red-headed Woodpecker Melanerpes erythrocephalus
• Red-bellied Woodpecker Melanerpes carolinus
• Yellow-bellied Sapsucker Sphyrapicus varius
• Downy Woodpecker Dryobates pubescens
• Red-cockaded Woodpecker Dryobates borealis
• Hairy Woodpecker Dryobates villosus
• Northern Flicker Colaptes auratus
• Pileated Woodpecker Dryocopus pileatus
• Crested Caracara Caracara plancus
• American Kestrel Falco sparverius
• Merlin Falco columbarius
• Gyrfalcon Falco rusticolus
• Peregrine Falcon Falco peregrinus
• Carolina Parakeet Conuropsis carolinensis
• Ash-throated Flycatcher Myiarchus cinerascens
• Great Crested Flycatcher Myiarchus crinitus
• Tropical Kingbird Tyrannus melancholicus
• Couch's Kingbird Tyrannus couchii
• Western Kingbird Tyrannus verticalis
• Eastern Kingbird Tyrannus tyrannus
• Gray Kingbird Tyrannus dominicensis
• Scissor-tailed Flycatcher Tyrannus forficatus
• Fork-tailed Flycatcher Tyrannus savana
• Olive-sided Flycatcher Contopus cooperi
• Eastern Wood-Pewee Contopus virens
• Yellow-bellied Flycatcher Empidonax flaviventris
• Acadian Flycatcher Empidonax virescens
• Alder Flycatcher Empidonax alnorum
• Willow Flycatcher Empidonax traillii
• Least Flycatcher Empidonax minimus
• Hammond's Flycatcher Empidonax hammondii
• Pacific-slope/Cordilleran Flycatcher Empidonax difficilis/occidentalis
• Eastern Phoebe Sayornis phoebe
• Say's Phoebe Sayornis saya
• Vermilion Flycatcher Pyrocephalus rubinus
• White-eyed Vireo Vireo griseus
• Bell's Vireo Vireo bellii
• Yellow-throated Vireo Vireo flavifrons
• Blue-headed Vireo Vireo solitarius
• Philadelphia Vireo Vireo philadelphicus
• Warbling Vireo Vireo gilvus
• Red-eyed Vireo Vireo olivaceus
• Loggerhead Shrike Lanius ludovicianus
• Northern Shrike Lanius borealis
• Blue Jay Cyanocitta cristata
• American Crow Corvus brachyrhynchos
• Fish Crow Corvus ossifragus
• Common Raven Corvus corax
• Carolina Chickadee Poecile carolinensis
• Black-capped Chickadee Poecile atricapillus
• Boreal Chickadee Poecile hudsonicus
• Tufted Titmouse Baeolophus bicolor
• Horned Lark Eremophila alpestris
• Bank Swallow Riparia riparia
• Tree Swallow Tachycineta bicolor
• Northern Rough-winged Swallow Stelgidopteryx serripennis
• Purple Martin Progne subis
• Barn Swallow Hirundo rustica
• Cliff Swallow Petrochelidon pyrrhonota
• Cave Swallow Petrochelidon fulva
• Golden-crowned Kinglet Regulus satrapa
• Ruby-crowned Kinglet Corthylio calendula
• Bohemian Waxwing Bombycilla garrulus
• Cedar Waxwing Bombycilla cedrorum
• Red-breasted Nuthatch Sitta canadensis
• White-breasted Nuthatch Sitta carolinensis
• Brown-headed Nuthatch Sitta pusilla
• Brown Creeper Certhia americana
• Blue-gray Gnatcatcher Polioptila caerulea
• Rock Wren Salpinctes obsoletus
• House Wren Troglodytes aedon
• Winter Wren Troglodytes hiemalis
• Sedge Wren Cistothorus stellaris
• Marsh Wren Cistothorus palustris
• Carolina Wren Thryothorus ludovicianus
• Bewick's Wren Thryomanes bewickii
• Gray Catbird Dumetella carolinensis
• Brown Thrasher Toxostoma rufum
• Sage Thrasher Oreoscoptes montanus
• Northern Mockingbird Mimus polyglottos
• European Starling Sturnus vulgarisNonnative
• Eastern Bluebird Sialia sialis
• Mountain Bluebird Sialia currucoides
• Townsend's Solitaire Myadestes townsendi
• Veery Catharus fuscescens
• Gray-cheeked Thrush Catharus minimus
• Bicknell's Thrush Catharus bicknelli
• Swainson's Thrush Catharus ustulatus
• Hermit Thrush Catharus guttatus
• Wood Thrush Hylocichla mustelina
• American Robin Turdus migratorius
• Varied Thrush Ixoreus naevius
• Northern Wheatear Oenanthe oenanthe
• House Sparrow Passer domesticusNonnative
• American Pipit Anthus rubescens
• Evening Grosbeak Coccothraustes vespertinus
• Pine Grosbeak Pinicola enucleator
• House Finch Haemorhous mexicanusNonnative
• Purple Finch Haemorhous purpureus
• Common Redpoll Acanthis flammea
• Hoary Redpoll Acanthis hornemanni
• Red Crossbill Loxia curvirostra
• White-winged Crossbill Loxia leucoptera
• Pine Siskin Spinus pinus
• American Goldfinch Spinus tristis
• Lapland Longspur Calcarius lapponicus
• Chestnut-collared Longspur Calcarius ornatus
• Smith's Longspur Calcarius pictus
• Snow Bunting Plectrophenax nivalis
• Cassin's Sparrow Peucaea cassinii
• Bachman's Sparrow Peucaea aestivalis
• Grasshopper Sparrow Ammodramus savannarum
• Lark Sparrow Chondestes grammacus
• Lark Bunting Calamospiza melanocorys
• Chipping Sparrow Spizella passerina
• Clay-colored Sparrow Spizella pallida
• Field Sparrow Spizella pusilla
• Fox Sparrow Passerella iliaca
• American Tree Sparrow Spizelloides arborea
• Dark-eyed Junco Junco hyemalis
• White-crowned Sparrow Zonotrichia leucophrys
• Golden-crowned Sparrow Zonotrichia atricapilla
• Harris's Sparrow Zonotrichia querula
• White-throated Sparrow Zonotrichia albicollis
• Vesper Sparrow Pooecetes gramineus
• LeConte's Sparrow Ammospiza leconteii
• Seaside Sparrow Ammospiza maritima
• Nelson's Sparrow Ammospiza nelsoni
• Saltmarsh Sparrow Ammospiza caudacuta
• Baird's Sparrow Centronyx bairdii
• Henslow's Sparrow Centronyx henslowii
• Savannah Sparrow Passerculus sandwichensis
• Song Sparrow Melospiza melodia
• Lincoln's Sparrow Melospiza lincolnii
• Swamp Sparrow Melospiza georgiana
• Green-tailed Towhee Pipilo chlorurus
• Spotted Towhee Pipilo maculatus
• Eastern Towhee Pipilo erythrophthalmus
• Yellow-breasted Chat Icteria virens
• Yellow-headed Blackbird Xanthocephalus xanthocephalus
• Bobolink Dolichonyx oryzivorus
• Eastern Meadowlark Sturnella magna
• Western Meadowlark Sturnella neglecta
• Orchard Oriole Icterus spurius
• Bullock's Oriole Icterus bullockii
• Baltimore Oriole Icterus galbula
• Red-winged Blackbird Agelaius phoeniceus
• Shiny Cowbird Molothrus bonariensis
• Brown-headed Cowbird Molothrus ater
• Rusty Blackbird Euphagus carolinus
• Brewer's Blackbird Euphagus cyanocephalus
• Common Grackle Quiscalus quiscula
• Boat-tailed Grackle Quiscalus major
• Ovenbird Seiurus aurocapilla
• Worm-eating Warbler Helmitheros vermivorum
• Louisiana Waterthrush Parkesia motacilla
• Northern Waterthrush Parkesia noveboracensis
• Golden-winged Warbler Vermivora chrysoptera
• Blue-winged Warbler Vermivora cyanoptera
• Black-and-white Warbler Mniotilta varia
• Prothonotary Warbler Protonotaria citrea
• Swainson's Warbler Limnothlypis swainsonii
• Tennessee Warbler Leiothlypis peregrina
• Orange-crowned Warbler Leiothlypis celata
• Nashville Warbler Leiothlypis ruficapilla
• Virginia's Warbler Leiothlypis virginiae
• Connecticut Warbler Oporornis agilis
• Mourning Warbler Geothlypis philadelphia
• Kentucky Warbler Geothlypis formosa
• Common Yellowthroat Geothlypis trichas
• Hooded Warbler Setophaga citrina
• American Redstart Setophaga ruticilla
• Cape May Warbler Setophaga tigrina
• Cerulean Warbler Setophaga cerulea
• Northern Parula Setophaga americana
• Magnolia Warbler Setophaga magnolia
• Bay-breasted Warbler Setophaga castanea
• Blackburnian Warbler Setophaga fusca
• Yellow Warbler Setophaga petechia
• Chestnut-sided Warbler Setophaga pensylvanica
• Blackpoll Warbler Setophaga striata
• Black-throated Blue Warbler Setophaga caerulescens
• Palm Warbler Setophaga palmarum
• Pine Warbler Setophaga pinus
• Yellow-rumped Warbler Setophaga coronata
• Yellow-throated Warbler Setophaga dominica
• Prairie Warbler Setophaga discolor
• Black-throated Gray Warbler Setophaga nigrescens
• Townsend's Warbler Setophaga townsendi
• Hermit Warbler Setophaga occidentalis
• Black-throated Green Warbler Setophaga virens
• Canada Warbler Cardellina canadensis
• Wilson's Warbler Cardellina pusilla
• Summer Tanager Piranga rubra
• Scarlet Tanager Piranga olivacea
• Western Tanager Piranga ludoviciana
• Northern Cardinal Cardinalis cardinalis
• Rose-breasted Grosbeak Pheucticus ludovicianus
• Black-headed Grosbeak Pheucticus melanocephalus
• Blue Grosbeak Passerina caerulea
• Lazuli Bunting Passerina amoena
• Indigo Bunting Passerina cyanea
• Painted Bunting Passerina ciris
• Dickcissel Spiza americana

Part 2: Subspecies/Forms (11)

• Greater White-fronted Goose (western) Anser albifrons frontalis/gambelli
• Brant (Black) Branta bernicla nigricans
• Green-winged Teal (Eurasian) Anas crecca crecca
• Whimbrel (European) Numenius phaeopus phaeopus
• Iceland Gull (Thayer's) Larus glaucoides thayeri
• Cory's Shearwater (Scopoli's) Calonectris diomedea diomedea
• Great Blue Heron (Great White) Ardea herodias occidentalis
• Dark-eyed Junco (Oregon) Junco hyemalis oreganus
• White-crowned Sparrow (Gambel's) Zonotrichia leucophrys gambelii
• Savannah Sparrow (Ipswich) Passerculus sandwichensis princeps
• Yellow-rumped Warbler (Audubon's) Setophaga coronata auduboni

Part 3: Questionable Origin (8)

• Baikal Teal Sibirionetta formosa
• Falcated Duck Mareca falcata
• Callipepla species Callipepla sp.
• Southern Lapwing Vanellus chilensis
• Monk Parakeet Myiopsitta monachus
• European Goldfinch Carduelis carduelis
• Silver Gull Chroicocephalus novaehollandiae
• European Greenfinch Carduelis chloris

Part 4: Exotic Origin (2)

• Black Swan Cygnus atratusNonnative
• Great Tit Parus majorNonnative

Birds people confuse

Turkey vulture or Black vulture?

Turkey vulture Not stated

No confirmed photo of Black vulture

Black vulture Not stated

Black vulture: grayish-black head, shorter tail, a white patch near the wing tips (seen from below), and wings held nearly horizontal when soaring, with frequent flapping (Missouri). Tennessee and NPS Everglades say the same: black head, white patch at the wing tips, wings held flat. Turkey vulture: red head (adults), two-toned wings held in a V, rarely flaps. Note: juvenile turkey vultures also have dark heads.

Turkey vulture or Eagle?

Turkey vulture Not stated

Eagle Not stated

An eagle holds its wings flat and they are uniformly black; a turkey vulture's are held in a slight V and are two-toned.

Bald eagle or Golden eagle?

Bald eagle Not stated

No confirmed photo of Golden eagle

Golden eagle Not stated

Young bald eagles lack the white head and tail and are often mistaken for golden eagles. Bald eagles have unfeathered lower legs and hold their wings flat when soaring; TWRA says golden eagles have feathered legs, limited white under the wing, and lift the outer wing in a slight V.

Red-tailed hawk or Red-shouldered hawk?

Red-tailed hawk Not stated

No confirmed photo of Red-shouldered hawk

Red-shouldered hawk Not stated

A red-tail's rust-colored, broad, short tail distinguishes it from the smaller red-shouldered hawk (North Carolina). Tennessee: the red-shouldered hawk has a black and white banded tail and appears more uniformly colored.

Northern cardinal or Summer tanager?

Northern cardinal Not stated

Summer tanager Not stated

MDC: the adult male summer tanager is entirely rosy red, slightly darker on wings and tail, and is a summer resident; the adult male northern cardinal has a crest and a black area around its large red bill and is present year-round. TWRA says the summer tanager is the only other all-red songbird in Tennessee.

Photos show typical adults; individuals vary. Never get close to compare.

When birds are active in Maryland

Records of birds in Maryland peak in March to June and September to October. They show when people record birds, not how many there are (about month bars).

About this list

The species list comes from Official List of the Birds of Maryland (Maryland Department of Natural Resources (DNR), as of 28 July 2021; Internet Archive capture of DNR copy).

Venom does not apply to birds.

"Nonnative" and "Invasive" follow the wording of the source list. See invasive species in Maryland.