Checklist of the Birds of Delaware County - 330 Species      
 
Seasonal Status Abundance Codes
 
SP - March thru May C - Common: certain to be seen in suitable habitat in proper season
  U - Uncommon: present, but not certain to be seen
S - June thru July O - Occasional: seen annually, but only a few times during a season
  R - Rare: not seen annually
F - August thru November X - Accidental; less than three records
 
W - December thru February
 
 
                   
Species SP S F W Species SP S F W
  Greater White-fronted Goose       X   Common Loon U X U R
  Snow Goose O R O O Pied-billed Grebe U R U U
  Ross's Goose       X   Horned Grebe O   O O
  Brant     R R   Red-necked Grebe R   R R
  Cackling Goose R   R R   Eared Grebe X      
  Canada Goose C C C C Leach's Storm-Petrel     X  
Mute Swan R R R R   Northern Gannet X   X  
  Tundra Swan O   O O   Double-crested Cormorant C U C O
  Wood Duck C C C R   Great Cormorant R     R
  Gadwall U   U R   Anhinga   X    
  Eurasian Wigeon X         American Bittern R R R R
  American Wigeon U   U O   Least Bittern O O O  
  American Black Duck U U U U   Great Blue Heron C C C U
  Mallard C C C C   Great Egret C C C R
  Blue-winged Teal U R U R   Snowy Egret U U U  
  Northern Shoveler C R C U   Little Blue Heron R U U  
  Northern Pintail C R C U   Tricolored Heron X R R  
  Green-winged Teal C R C U   Cattle Egret R R R  
  Canvasback R   R R   Green Heron C C C R
  Redhead R   R R   Black-crowned Night-Heron U U U O
  Ring-necked Duck U   U O   Yellow-crowned Night-Heron R R R  
  Greater Scaup O   O O   White Ibis   R R  
  Lesser Scaup R   R R   Glossy Ibis R R R  
  Surf Scoter X   X X   Black Vulture U U U U
  White-winged Scoter     R X   Turkey Vulture C C C C
  Black Scoter     R X   Osprey U R U X
  Long-tailed Duck R   R R   Swallow-tailed Kite   X    
  Bufflehead U X U U   Golden Eagle X   R R
  Common Goldeneye O   O O   Mississippi Kite   X    
  Hooded Merganser U   U U   Northern Harrier U R U O
  Common Merganser C   U C   Sharp-shinned Hawk U R C U
  Red-breasted Merganser R     R   Cooper's Hawk U O U U
  Ruddy Duck U R U U   Northern Goshawk R R O R
Ring-necked Pheasant O O O O   Bald Eagle U U U U
  Wild Turkey O   O O   Red-shouldered Hawk U R U R
Northern Bobwhite O O O R   Broad-winged Hawk C U C X
  Red-throated Loon R   R R   Swainson's Hawk     X  
                   
Species SP S F W Species SP S F W
  Red-tailed Hawk C U C C   Red Phalarope     X  
Rough-legged Hawk R   R R   Black-legged Kittiwake       X
  Yellow Rail X   X     Sabine's Gull     X  
  Black Rail X   R     Bonaparte's Gull O   O  
  King Rail R R R X   Little Gull X      
  Virginia Rail O O O R   Laughing Gull C U C R
  Sora R R R R   Ring-billed Gull C C C C
  Common Gallinule O O O R   Herring Gull U U U U
  American Coot U   U U   Iceland Gull R   R R
  Sandhill Crane   X X     Lesser Black-backed Gull     R R
  Black-bellied Plover R   O X   Glaucous Gull R   R R
  American Golden-Plover X   R     Great Black-backed Gull U U U U
  Wilson's Plover X         Sooty Tern     X  
  Semipalmated Plover U O U     Least Tern     R  
  Piping Plover     X     Gull-billed Tern     X  
  Killdeer U U U U   Caspian Tern O O U  
American Oystercatcher     X   Black Tern R R R  
  Black-necked Stilt   X X     Common Tern R   R  
  American Avocet X   X   Arctic Tern     X  
  Spotted Sandpiper U U U     Forster's Tern U U C  
  Solitary Sandpiper U O U     Royal Tern     X  
  Greater Yellowlegs U R U R   Black Skimmer     X  
  Willet X   X   Pomarine Jaeger     X  
  Lesser Yellowlegs U R U R Parasitic Jaeger     X  
  Upland Sandpiper R R R   Dovekie       X
  Whimbrel X   X     Rock Pigeon C C C C
  Black-tailed Godwit     X     Mourning Dove C C C C
  Hudsonian Godwit   R R     Yellow-billed Cuckoo O O O  
  Marbled Godwit   R       Black-billed Cuckoo O O O  
  Ruddy Turnstone R     X   Barn Owl R R R R
  Red Knot R   X     Eastern Screech-Owl U U U U
  Sanderling     R     Great Horned Owl U U U U
  Semipalmated Sandpiper U O C     Snowy Owl R     R
  Western Sandpiper   O O     Barred Owl R R R R
  Least Sandpiper U O C X   Long-eared Owl R   R R
  White-rumped Sandpiper   O O     Short-eared Owl R R R R
  Baird's Sandpiper   O O     Northern Saw-whet Owl R   R R
  Pectoral Sandpiper U O U X   Common Nighthawk O O U  
  Dunlin O   O R   Eastern Whip-poor-will R R R  
  Curlew Sandpiper   X X     Chimney Swift C C C  
  Stilt Sandpiper     O     Ruby-throated Hummingbird U C U  
  Buff-breasted Sandpiper     R     Rufous Hummingbird     X X
  Ruff R   R X   Belted Kingfisher U U U O
  Short-billed Dowitcher O   O     Red-headed Woodpecker R   R R
  Long-billed Dowitcher   R R     Red-bellied Woodpecker C C C C
  Wilson's Snipe U   U U   Yellow-bellied Sapsucker O   O O
American Woodcock O O O R   Downy Woodpecker C C C C
  Wilson's Phalarope R   R     Hairy Woodpecker U U U U
  Red-necked Phalarope X   R     Black-backed Woodpecker X     X
                   
Species SP S F W Species SP S F W
  Northern Flicker C C C C   Carolina Wren C C C C
  Pileated Woodpecker O O O O   Blue-gray Gnatcatcher C C C R
  American Kestrel U U C U   Golden-crowned Kinglet U   U O
  Merlin R   O R   Ruby-crowned Kinglet C   C O
  Peregrine Falcon R R O R   Eastern Bluebird U U U U
  Olive-sided Flycatcher O R O     Veery C C C  
  Eastern Wood-Pewee C C C     Gray-cheeked Thrush O   O  
  Yellow-bellied Flycatcher O   O     Swainson's Thrush U   U  
  Acadian Flycatcher C C C     Hermit Thrush     U O
  Alder Flycatcher R   R     Wood Thrush U U U X
  Willow Flycatcher U C U     American Robin C C C C
  Least Flycatcher O X O     Varied Thrush       X
  Eastern Phoebe U U U     Gray Catbird C C C R
  Say's Phoebe     X     Northern Mockingbird C C C C
  Great Crested Flycatcher U U U     Brown Thrasher O O O R
  Western Kingbird     R     European Starling C C C C
  Eastern Kingbird C C C     American Pipit O   O R
  Scissor-tailed Flycatcher     X     Cedar Waxwing U U U U
  Loggerhead Shrike R   R R   Lapland Longspur R   R R
  Northern Shrike X   X X   Snow Bunting O   O O
  White-eyed Vireo C C C     Ovenbird C C C R
  Yellow-throated Vireo O O O     Worm-eating Warbler O R O  
  Blue-headed Vireo O   O     Louisiana Waterthrush O O O  
  Warbling Vireo U U U     Northern Waterthrush O   O  
  Philadelphia Vireo X   O     Blue-winged Warbler U U U  
  Red-eyed Vireo C C C     Golden-winged Warbler R   R  
  Blue Jay C C C C   Black-and-white Warbler U R U X
  American Crow C C C C   Prothonotary Warbler R R    
  Fish Crow O O O O   Swainson's Warbler     X  
  Common Raven U U U U   Tennessee Warbler O   O  
  Horned Lark R R R R   Orange-crowned Warbler R   R R
  Northern Rough-winged Swallow U U U     Nashville Warbler O   O X
  Purple Martin U U U     Connecticut Warbler X   R  
  Tree Swallow C C C     Mourning Warbler R   R  
  Bank Swallow U R U   Kentucky Warbler O O O  
  Barn Swallow C C C   Common Yellowthroat C C C R
  Cliff Swallow O O O     Hooded Warbler O O O  
Cave Swallow     X     American Redstart C U C  
  Carolina Chickadee C C C C   Cape May Warbler O   O X
  Black-capped Chickadee R   R O   Cerulean Warbler R R R  
  Boreal Chickadee X   X X   Northern Parula U U U  
  Tufted Titmouse C C C C   Magnolia Warbler U   U  
  Red-breasted Nuthatch U R U U   Bay-breasted Warbler O   O  
  White-breasted Nuthatch U U U U   Blackburnian Warbler O   O  
  Brown Creeper O X O O   Yellow Warbler C C C X
  House Wren C C C R   Chestnut-sided Warbler U U U  
  Winter Wren O   O O   Blackpoll Warbler U R U  
  Sedge Wren     R     Black-throated Blue Warbler U   U  
  Marsh Wren U U U R   Pine Warbler O R O R
                   
Species SP S F W Species SP S F W
  Palm Warbler U   U R   Rusty Blackbird O   O O
  Yellow-rumped Warbler C   C O   Brewer's Blackbird X     X
  Yellow-throated Warbler O R R     Common Grackle C C C U
  Prairie Warbler U U U     Brown-headed Cowbird C C C U
  Black-throated Gray Warbler     X     Orchard Oriole O O O  
  Townsend's Warbler     X     Baltimore Oriole C C C R
  Black-throated Green Warbler U   U X Pine Grosbeak     X X
  Canada Warbler O R O     Purple Finch O   O O
  Wilson's Warbler O   O R   House Finch C C C C
  Yellow-breasted Chat O O O R   Red Crossbill R   R R
  Eastern Towhee U U U O   White-winged Crossbill R   R R
  American Tree Sparrow O   O O   Common Redpoll R   R R
  Chipping Sparrow C C C R   Pine Siskin R   R R
  Clay-colored Sparrow R   R X   American Goldfinch C C C C
  Field Sparrow U U U O   Evening Grosbeak R   R R
  Vesper Sparrow R   O R   House Sparrow C C C C
  Lark Sparrow     X X          
  Savannah Sparrow O   O R  
  Grasshopper Sparrow R R     Total Species 330
  LeConte's Sparrow X     X  
  Nelson's Sharp-tailed Sparrow X   X    
  Seaside Sparrow X        
  Fox Sparrow O   O O Additional Species        
  Song Sparrow C C C C Hypothetical: may have occurred        
  Lincoln's Sparrow O   O X   King Eider        
  Swamp Sparrow U U U O   Ruffed Grouse        
  White-throated Sparrow C R C C   Audubon's Shearwater        
  White-crowned Sparrow O   O R   Clapper Rail        
Golden-crowned Sparrow       X   Black Guillemot        
  Dark-eyed Junco C   C C   Atlantic Puffin        
  Summer Tanager R   X     Bewick's Wren        
  Scarlet Tanager U U U            
  Western Tanager X        
  Northern Cardinal C C C C  
  Rose-breasted Grosbeak U R U   Extirpated: formerly occurred        
  Black-headed Grosbeak X         Whooping Crane        
  Blue Grosbeak O O O     Red-cockaded Woodpecker        
  Indigo Bunting C C C X          
  Painted Bunting X     X  
  Dickcissel R   R R Extinct        
  Bobolink O O U X   Passenger Pigeon        
  Red-winged Blackbird C C C U          
  Eastern Meadowlark O R O R  
  Yellow-headed Blackbird R     R