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White Ibis. © Howard B. Eskin	Yellow-headed blackbird. © Howard B. Eskin	Red Knot. © Howard B. Eskin

One hundred forty-six species of waterbirds regularly occur in bird conservation regions where greater than 10% of the land is in row-crop production. Most have exhibited long-term continental increases in population but thirty-nine species have decreasing populations.

Waterbird species with increasing populations

Waterbird species with decreasing populations

Waterbird species with stable populations

Waterbird species with insufficient data

TABLE 1: Species with increasing populations (71 spp.)
Common Name	Scientific Name
Black-bellied Whistling-Duck	Dendrocygna autumnalis
Greater White-fronted Goose	Anser albifrons
Snow Goose	Chen caerulescens
Ross's Goose	Chen rossii
Canada Goose (including Cackling)	Branta canadensis (including Branta hutchinsii)
Trumpeter Swan	Cygnus buccinator
Wood Duck	Aix sponsa
Gadwall	Anas strepera
American Wigeon	Anas americana
American Black Duck	Anas rubripes
Mallard	Anas platyrhynchos
Northern Shoveler	Anas clypeata
Ring-necked Duck	Aythya collaris
White-winged Scoter	Melanitta fusca
Bufflehead	Bucephala albeola
Common Goldeneye	Bucephala clangula
Hooded Merganser	Lophodytes cucullatus
Ruddy Duck	Oxyura jamaicensis
Common Loon	Gavia immer
Pied-billed Grebe	Podilymbus podiceps
Red-necked Grebe	Podiceps grisegena
Eared Grebe	Podiceps nigricollis
American White Pelican	Pelecanus erythrorhynchos
Double-crested Cormorant	Phalacrocorax penicillatus
Anhinga	Anhinga anhinga
Great Blue Heron	Ardea herodias
Great Egret	Ardea alba
Snowy Egret	Egretta thula
Reddish Egret	Egretta rufescens
Black-crowned Night-Heron	Nycticorax nycticorax
White Ibis	Eudocimus albus
Glossy Ibis	Plegadis falcinellus
White-faced Ibis	Plegadis chihi
Roseate Spoonbill	Platalea ajaja
Wood Stork	Mycteria americana
Osprey	Pandion haliaetus
Bald Eagle	Haliaeetus leucocephalus
Yellow Rail	Coturnicops novaboracensis
Virginia Rail	Rallus limicola
Common Moorhen	Gallinula chloropus
Sandhill Crane	Grus canadensis
Semipalmated Plover	Charadrius semipalmatus
American Oystercatcher	Haematopus palliatus
Black-necked Stilt	Himantopus mexicanus
American Avocet	Recurvirostra americana
Greater Yellowlegs	Tringa melanoleuca
Upland Sandpiper	Bartramia longicauda
Ruddy Turnstone	Arenaria interpres
Stilt Sandpiper	Calidris himantopus
Short-billed Dowitcher	Limnodromus griseus
Long-billed Dowitcher	Limnodromus scolopaceus
Wilson's Phalarope	Phalaropus tricolor
Laughing Gull	Larus atricilla
Franklin's Gull	Larus pipixcan
Bonaparte's Gull	Larus philadelphia
Ring-billed Gull	Larus delawarensis
California Gull	Larus californicus
Thayer's & Iceland Gulls	Larus thayeri, Larus glaucoides
Caspian Tern	Sterna caspia
Royal Tern	Sterna maxima
Forster's Tern	Sterna forsteri
Black Phoebe	Sayornis nigricans
Eastern Phoebe	Sayornis phoebe
Fish Crow	Corvus ossifragus
Sedge Wren	Cistothorus platensis
Marsh Wren	Cistothorus palustris
Louisiana Waterthrush	Seiurus motacilla
Nelson's Sharp-tailed Sparrow	Ammodramus nelsoni
Swamp Sparrow	Melospiza georgiana
Yellow-headed Blackbird	Xanthocephalus xanthocephalus
Boat-tailed Grackle	Quiscalus major

TABLE 2: Species with decreasing populations (39 spp.)
Common Name	Scientific Name
Tundra Swan	Cygnus columbianus
Mottled Duck	Anas fulvigula
Cinnamon Teal	Anas cyanoptera
Northern Pintail	Anas acuta
Canvasback	Aythya valisineria
Greater Scaup	Aythya marila
Lesser Scaup	Aythya affinis
Long-tailed Duck	Clangula hyemalis
Yellow-billed Loon	Gavia adamsii
Horned Grebe	Podiceps auritus
Clark's & Western Grebes (combined)	Aechmophorus clarkii, Aechmophorus occidentalis
American Bittern	Botaurus lentiginosus
Little Blue Heron	Egretta caerulea
Cattle Egret	Bubulcus ibis
Green Heron	Butorides virescens
Yellow-crowned Night-Heron	Nyctanassa violacea
King Rail	Rallus elegans
American Coot	Fulica americana
American & Pacific Golden-Plovers	Pluvialis dominica, Pluvialis fulva
Wilson's Plover	Charadrius wilsonia
Piping Plover	Charadrius melodus
Mountain Plover	Charadrius montanus
Lesser Yellowlegs	Tringa flavipes
Solitary Sandpiper	Tringa solitaria
Spotted Sandpiper	Actitis macularius
Whimbrel	Numenius phaeopus
Long-billed Curlew	Numenius americanus
Western Sandpiper	Calidris mauri
Wilson's Snipe	Gallinago delicata
Herring Gull	Larus argentatus
Common Tern	Sterna hirundo
Least Tern	Sterna antillarum
Black Tern	Chlidonias niger
Bank Swallow	Riparia riparia
Prothonotary Warbler	Protonotaria citrea
Le Conte's Sparrow	Ammodramus leconteii
Seaside Sparrow	Ammodramus maritimus
Red-winged Blackbird	Agelaius phoeniceus
Rusty Blackbird	Euphagus carolinus

TABLE 3: Species with stable populations (27 spp.)
Common Name	Scientific Name
Blue-winged Teal	Anas discors
Green-winged Teal	Anas crecca
Redhead	Aythya americana
Common Merganser	Mergus merganser
Red-breasted Merganser	Mergus serrator
Least Bittern	Ixobrychus exilis
Tricolored Heron	Egretta tricolor
Black Rail	Laterallus jamaicensis
Sora	Porzana carolina
Black-bellied Plover	Pluvialis squatarola
Snowy Plover	Charadrius alexandrinus
Killdeer	Charadrius vociferus
Willet	Catoptrophorus semipalmatus
Marbled Godwit	Limosa fedoa
Sanderling	Calidris alba
Least Sandpiper	Calidris minutilla
Dunlin	Calidris alpina
American Woodcock	Scolopax minor
Belted Kingfisher	Ceryle alcyon
Alder Flycatcher	Empidonax alnorum
Purple Martin	Progne subis
Tree Swallow	Tachycineta bicolor
Northern Rough-winged Swallow	Stelgidopteryx serripennis
American Dipper	Cinclus mexicanus
Northern Waterthrush	Seiurus noveboracensis
Common Yellowthroat	Geothlypis trichas
Lincoln's Sparrow	Melospiza lincolnii

TABLE 4: Species with insufficient data (9 spp.)
Common Name	Scientific Name
Eskimo Curlew	Numenius borealis
Hudsonian Godwit	Limosa haemastica
Semipalmated Sandpiper	Calidris pusilla
White-rumped Sandpiper	Calidris fuscicollis
Baird's Sandpiper	Calidris bairdii
Pectoral Sandpiper	Calidris melanotos
Buff-breasted Sandpiper	Tryngites subruficollis
Red-necked Phalarope	Phalaropus lobatus