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What was the SIZE of the Sheen or Iridescence Duck-like bird you saw in Aleutians?



Common Loon: Large loon, white-spotted, black upperparts and white underparts. Head, neck are green-black with white-streaked neckbands. Bill is black and thick. Eyes are red-brown. Dives for small fish and crustaceans. Direct flight on strong deep wing beats, head, neck and feet extend beyond body.
Mallard: This medium-sized duck has a gray body, chestnut-brown breast, green head, white neck ring, yellow bill, wing speculum is white-bordered metallic purple-blue, white edged dark tail, two curled black feathers, and orange legs and feet. Feeds on insects and crustaceans. Females are mottled brown with orange-brown bills and no curled tail feathers. Swift direct flight with strong wing beats.
Northern Pintail: This large duck has gray and black upperparts, white neck and underparts, gray sides, long black pointed tail, brown head, throat and nape. White stripe divides front and back of neck, green speculum is bordered by buff. Feeds on seeds and aquatic insects. Females are mottled brown all over with slim, tan head, long neck and a shorter tail. Direct flight with rapid wing beats.
Surf Scoter: This medium-sized diving duck is entirely black except for white patches on the forehead and nape. It has an orange, black and white bill, white eyes and orange legs and feet. The female is less distinctly marked with smudgy face patches and dark bill. It dives for food, primarily mollusks and crustaceans. Rapid direct flight with strong wing beats. Flies in straight line formation.
Northern Shoveler: This is a medium-sized dabbling duck with a large spoon-shaped bill. Males have a dark green head, dark bill, orange legs, yellow eyes, white breast and chestnut patch on the flanks; females are mottled light brown with orange-brown bill and legs and dark eyes. They feed mostly on aquatic plants and seeds. They have a strong direct flight with powerful rapid wing beats.
Bufflehead: This small diving duck is mostly white with a glossy green-black to purple-black head and back. The head has a large white patch behind eye. The wings are dark with white patches visible in flight. It feeds on aquatic plant seeds, and insects, larvae and snails. It has a swift direct flight with rapid wing beats.
Common Goldeneye: Medium diving duck, white-striped black upperparts, white underparts. Head is iridescent green-black with white circular patch between yellow eyes and dark gray bill. Wings are dark with large white patches conspicuous in flight. Legs and feet are yellow. Swift, direct flight.
Red-breasted Merganser: This medium-sized diving duck has black upperparts, gray sides, rust-brown breast, white belly, green head, double crests and neck, and white neck ring. The long thin bill, legs and feet are bright orange. Females are brown-gray with gray-washed, red-brown head, double crest and white breast and belly. Feeds mostly on small fish. Swift direct flight with rapid wing beats.
Red-necked Grebe: This large grebe has dark gray upperparts and cap, white lower face and nape, white underparts with gray flanks, red-brown neck and dark brown eyes. It has a long thick yellow bill with a dark tip and black legs and feet. Dives for small fish and crustaceans. Direct flight on rapid wing beats. Sexes are similar.
Black Scoter: Medium diving duck, entirely black except for yellow knob at base of black bill. Legs and feet are black. The male is the only all black duck in North America. Dives for food, primarily eats mollusks. Strong direct flight with rapid wing beats. Flies in straight line and V formation.
Green-winged Teal: This small dabbling duck has pale, gray-barred sides and a buff breast with a white bar down the side. The head is chestnut-brown with a green ear patch, the bill is dark gray, and the legs and feet are olive-gray. The speculum is flashy green bordered with brown above and white below. Diet includes seeds, insects and grasses. Flight is often low and erratic.
Harlequin Duck: Small diving duck, blue-gray upperparts and underparts, rust-brown flanks. Back, breast and neck have vivid black-bordered white bars. Tail is dark and relatively long. Gray legs, feet. Feeds on insects, mollusks and crustaceans. Rapid direct flight, often low over the water.
Steller's Eider: Small eider with black back and collar, white sides, buff-brown underparts with small but distinct black spot on side. White head has a dark tuft, black eye patch and chin. Wings are white with black primaries and a white-bordered blue speculum. Blue-gray bill, legs and feet.
Yellow-billed Loon: Large loon, white-spotted black upperparts, white underparts, gray sides with fine white spots. Head is glossy green-black; neck has black-and-white rings. Yellow bill. Dives for small fish, crustaceans. Direct flight on deep wing beats. Solitary, or in pairs and family groups.
Pacific Loon: This medium-sized loon has a black-and-white checkered back and white underparts. It has a gray crown and nape, red eyes and a slender black bill. Iridescent throat patch can appear purple, green or black. Feeds mostly on fish, some crustaceans and insects. Flight is direct with rapid wing beats. Sexes are similar.
Common Merganser: Large, sleek diving duck with black upperparts and white underparts. Head and upper neck are green-black with head crest usually not visible. Long, thin bill is bright red. Wings are black with extensive white patches. Feeds on fish, mollusks, crustaceans, insects and plants.
Eastern Spot-billed Duck: Native of Asia, named for red spots at base of yellow-tipped black bill; subspecies occurring in North America generally lacks these spots. Scaled brown overall with buff face, neck, upper breast. Dark crown, nape, eyestripe. Blue speculum with white borders; orange legs and feet.
Greater Scaup: This large diving duck has a glossy green-black head, white sides and belly, black tail, neck and breast, barred gray flanks and back. The eyes are yellow and the bill is blue-gray with a black tip. The diet includes aquatic insects and plants. It has a rapid direct flight with strong, quick wing beats. The female is dull brown with a white patch on the face at base of bill.
 
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