Table 2. Species summary of the Narragansett Bay Winter Waterfowl Survey for 2004–2011.
Mean is the average abundance for each species throughout the entire study area. Percent represents the fraction that each species contributes to the total for duration of the study. *Species making up less than 1% of the community, and considered rare. Trend analysis ( Figure 3) were not conducted on these rare species.
| Species | Species
Code |
Mean (+/-)
SD |
Percent |
|---|---|---|---|
|
American Black Duck
Anas rubripes |
ABDU | 1205 ± 176 | 5.95 |
|
American Wigeon
Anas americana |
AMWI | 456 ± 334 | 2.25 |
|
Barrow’s Goldeneye*
Bucephala islandica |
BAGO | 0.3 ± 0.7 | ~0 |
|
Black Scoter
Melanitta americana |
BLSC | 316 ± 355 | 1.56 |
|
Brant
Branta bernicla |
BRAN | 2525 ± 881 | 12.5 |
|
Bufflehead
Bucephala albeola |
BUFF | 1052 ± 431 | 5.19 |
|
Canada Goose
Branta canadensis |
CAGO | 2713 ± 1249 | 13.4 |
|
Common Eider
Somateria mollissima |
COEI | 1302 ± 579 | 6.43 |
|
Common Goldeneye
Bucephala clangula |
COGO | 1374 ± 532 | 6.78 |
|
Common Loon*
Gavia immer |
COLO | 67 ± 41 | 0.332 |
|
Common Merganser*
Mergus merganser |
COME | 26 ± 23 | 0.128 |
|
Gadwall*
Anas strepera |
GADW | 144 ± 105 | 0.712 |
|
Harlequin Duck*
Histrionicus histrionicus |
HADU | 71 ± 22 | 0.351 |
|
Hooded Merganser*
Lophodytes cucullatus |
HOME | 171 ± 110 | 0.842 |
|
Horned Grebe*
Podiceps auritus |
HOGR | 138 ± 185 | 0.682 |
|
King Eider*
Somateria spectabilis |
KIEI | 0.1 ± 0.3 | ~0 |
|
Long-tailed Duck*
Clangula hyemalis |
LTDU | 1 ± 2 | ~0 |
|
Mallard
Anas platyrhynchos |
MALL | 1002 ± 410 | 4.94 |
|
Red-breasted Merganser
Mergus serrator |
RBME | 771 ± 205 | 3.8 |
|
Scaup spp.
Aythya spp. |
SCAUP | 6146 ± 2750 | 30.3 |
|
Surf Scoter*
Melanitta perspicillata |
SUSC | 81 ± 66 | 0.401 |
|
Swan
Cygnus spp. |
SWAN | 618 ± 267 | 3.05 |
|
White-winged Scoter*
Melanitta fusca |
WWSC | 78 ± 130 | 0.386 |