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Scaup Duck
148. Aythya marila nearctica Stejn. AM. SCAUP DUCK; GREATER SCAUP DUCK; BROADBILL; BLUEBILL; BLACKHEAD. Ad.

Scaup is the most common of the small New Zealand ducks and is still found in many parts of the country, although its numbers have been greatly reduced compared with earlier days and in spite of hydro lakes offering additional habitat.

SCAUP DUCK, Anas Marila, Wils. Amer. Orn., vol. viii. p. 84.
FULIGULA MARILA, Scaup Duck, Swains. and Rich. F. Bor. Amer., vol. ii.p. 456.
SCAUP DUCK, Nutt. Man., vol. ii. p. 437.

Lesser Scaup
Athya affinis (Eyton)
Status Uncommon transient, very rare in winter. Gilpin (1880) referred to a mounted specimen without giving details, and Piers (notes) examined a bird collected on 18 February 1898.

LESSER SCAUP FACTS
Description
In the breeding season Lesser Scaup males have black head neck, breast and front part of the back. The rest of the back is white with fine black barring.

Lesser Scaup (Aythya affinis)
No photo of the Lesser Scaup available.
The Lesser Scaup is from the order Anseriformes. Anseriformes are birds, with over 150 species belonging to this order.

Lesser scaup (also called bluebills) are a favorite diving duck of Minnesota waterfowl hunters. They're found on big water, typically lakes and deep wetlands, and aren't shy about approaching hunting decoys.

Lesser Scaup Behaviour
No observations regarding Lesser Scaup behavior have been submitted to the database yet.
Interesting Facts about Lesser Scaups ...

Greater Scaup Photos
Click on the thumbnail for high-resolution photos. Click here for the species description page for the Greater Scaup.
Greater Scaup 1 ...

Greater Scaup
Credit: Wikipedia
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The Greater Scaup (Aythya marila) or just Scaup in Europe, is a species diving duck found in northern Arctic and sub-Arctic North America and Asia.

Occ lays eggs in nests of other Greater Scaups; clutches >11 likely result from such brood parasitism. Nests occ clustered, appearing semicolonial. Male deserts when incubation begins. Females often combine broods and cooperatively tend and defend.

Scaup are diving ducks with a resemblance to tufted ducks. Males have black heads, shoulder and breast, white flanks, grey back and a black tail. Females are brown, with characteristic white patches a... More...
Scottish crossbill ...

Lesser Scaup Aythya affinis
Masked Duck Nomonyx dominicus
KITES, EAGLES, HAWKS & ALLIES - ACCIPITRIDAE
Osprey Pandion haliaetus ...

Lesser Scaup Aythya affinis. Common in winter, spring, and fall in Tennessee Valley and Gulf Coast regions, and occasional in summer. Fairly common in winter, spring, and fall in Mountain and Inland Coastal Plain regions, and occasional in summer.

Lesser Scaup
Fall Sighting Information: uncommon
Nest on or near Refuge? no
Black Scoter
Fall Sighting Information: uncommon
Nest on or near Refuge? no ...

1: Lesser Scaup (male), Lake Merritt, California
2: Lesser Scaup (female), Lake Merritt, California
3-4: American White Pelican, Lake Merritt, California ...

New Zealand Scaup Aythya novaeseelandiae (Papango)
Raptors
Australasian Harrier Circus approximans (Kahu)
New Zealand Falcon Falco novaeseelandiae (Karearea) ...

Ducks are usually divided into three groups: the surface-feeding ducks—such as the mallard, wood duck, black duck, and teal—which frequent ponds, marshes, and other quiet waters; the diving ducks—such as the canvasback, scaup, ...

Aythya marila - Greater Scaup
Aythya affinis - Lesser Scaup
Somateria
Somateria mollissima - Common Eider
Somateria spectabilis - King Eider
Somateria fischeri - Spectacled Eider
Polysticta
Polysticta stelleri - Steller's Eider (photo) ...

Greater Scaup - Aythya marila
Lesser Scaup - Aythya affinis Rare/Accidental
Common Eider - Somateria mollissima
Steller's Eider - Polysticta stelleri
Long-tailed Duck - Clangula hyemalis
Common Scoter - Melanitta nigra ...

Greater Scaup (Aythya marila)
Greater White-fronted Goose (Anser albifrons)
Green-winged Teal (Anas crecca)
Hooded Merganser (Lophodytes cucullatus)
Lesser Scaup (Aythya affinis)
Long-tailed Duck (Oldsquaw) (Clangula hyemalis) ...

Greater Scaup 12. Black Kite 13. Common Sandpiper 14. Herring Gull 15. Black-tailed Gull 16. Ancient Murrelet 1 17. Japanese Murrelet 7 18. Oriental Turtle-dove 19. Common Kingfisher 20. Greater Spotted Woodpecker (call) 21.

The completed clutch is usually 8-9 (range 5-14) smooth, olive-gray to olive-brown eggs, indistinguishable from those of Lesser Scaup (A. affinis). The hen incubates the eggs (her mate leaves after the clutch is complete) for 25-29 days.

January 9, 2008: Added a few new shots of Great Blue Heron, Eastern Screech-Owl, Snowy Plover, Sanderling, Bufflehead, Pied-billed Grebe, Lesser Scaup, Blue-gray Gnatcatcher, Audubon's Oriole, Olive Sparrow, Green-tailed Towhee, Green Jay, ...

All are less common during the summer months and in more southern areas. The Greater Scaup is found along the coasts. Only the Ring-neck Duck breeds in Florida, but not regularly.
NCS
SpSuFW ...

Some females, such as the one in the third photo, show white at the base of the bill. This could cause confusion with female Scaup (Aythya marila) but look for some vestige of a tuft, the unevenly round head and the large black tip to the bill.

In general, life history and demographic aspects are less well known for this species than for other North American Aythya (except the Greater Scaup [Aythya marila]), the Wood Duck (Aix sponsa), prairie-nesting waterfowl, and Arctic-nesting geese, ...

See also: Duck, Greater scaup, Ring-necked Duck, Scoter, Mallard