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What was the SIZE of the Gray Gull-like bird you saw in Nova Scotia?



Mew Gull: Medium-sized gull with gray back and upperwings, and white head, neck, breast, and belly. Bill is bright yellow. Wings have white-spotted black tips; tail is white. Feet and legs are dull yellow. Graceful, bouyant flight. Undulating, with several rapid wingbeats and a pause.
California Gull: This is a medium-sized gull with a white head and underparts, gray wings and black wing tips. The bill and legs are yellow, and it has a red eyering. It has a strong direct flight with deep wing beats. It feeds on worms, mice, other birds and their eggs, and garbage. The sexes are similar, but the males are usually larger than females, with a larger bill, head and tarsi.
Caspian Tern: This large stocky tern has pale gray upperparts and white underparts. The cap is black and may appear weakly crested. The large bill is coral-red, the undersides of the primaries are gray, a short white tail is slightly forked, and the legs are black. The flight is strong, swift and graceful. It hovers above water before diving and mainly feeds on fish. The sexes are similar.
Forster's Tern: Medium tern, pale gray upperparts, black cap, white underparts. Bill is orange, black tip. Wings are pale gray with paler primaries. Tail is pale gray, deeply forked with dark inner edge, white outer edge. Orange legs, feet. Hovers above water before diving for prey.
Franklin's Gull: This medium-sized gull has a gray back and white underparts. It has a black head, white eye ring, orange bill with a black spot near the tip, and red-orange legs. The wings are short with white spotted black tips. It has a strong direct flight with deep wing beats. It feeds mostly on terrestrial and aquatic insects. The sexes are similar; males are slightly larger.
Least Tern: This small tern has slate-gray upperparts, white underparts; crown and nape are black, and the forehead is white. Black leading edge of outer wing is conspicuous in flight. The tail is forked, and the bill and feet are yellow. It feeds on small fish and invertebrates. It has a fast smooth flight with rapid wing beats. Hovers briefly before dipping down to seize prey. Sexes are similar.
Royal Tern: Large tern, pale gray upperparts; white face, neck, and underparts. Head has spiky, black crest and cap, and heavy, bright orange bill. Wings are black-tipped above and black-edged below; tail is deeply forked. Legs and feet are black. Hovers before plunge diving for prey.
Sabine's Gull: Small gull with gray back and white nape, rump, and underparts. Hood is solid black and eye-ring is dark red. Bill is black with yellow tip; legs and feet are black. The upperwings are gray with black primaries and white secondaries. Tail is slightly forked when folded.
South Polar Skua Dark: This small, gull-like skua occurs in two color phases. Dark phase adult has a dark brown body with a large white patch at base of primaries visible in flight. Dark bill, thick and heavy; short, broad tail. Light phase adult has pale gray-brown head and underparts. Feeds on fish, krill and squid. Strong direct flight with shallow wing beats. Sexes are similar.
Laughing Gull: This medium-sized gull has a gray back, white underparts and neck, a black hood and red bill. The wings are gray and white-edged, and black at the tips; tail is white. The legs and feet are black. Diet includes insects, fish, shellfish and crabs. It has a slow flight with deep wing beats and soars on updrafts. It is named for its laughter-like call. Sexes are similar.
Little Gull: The smallest of all gulls, with pale gray upperparts and white nape, neck, breast, belly, and tail. Hood is black and extends onto upper neck. Underwings are dark. Bill is dark red with black tip. Legs and feet are red-orange. Strong direct flight with deep wing beats.
Thayer's Gull: Having had full species status since 1973, as of 2017, the AOU considers this gull to be a subspecies of the Iceland Gull and has lumped it there. To see this please jump to the Iceland Gull species account. New subspecies range maps for this bird will be available in the next iBird update at which time we will retire the Thayer’s Gull as it’s own species.
Audubon's Shearwater: Small, stocky seabird with dark brown upperparts and white underparts. Underwing coverts are white. Tail is dark brown with short, gray undertail coverts. Bill is dark and legs and feet are pink. Fish and squid make up most of its diet. Alternates rapid wing beats with glides.
Fea's Petrel: Medium petrel, gray-brown upperparts, white belly. White breast with partial gray-brown breast band. Wings bend back at the wrist, have a dark M pattern across upperwings and lower back. Underwings are mostly dark. White face, dark mask around eyes. Gray tail, pale uppertail coverts.
Black-tailed Gull: Large gull with white head, neck, breast, and underparts; light charcoal-gray wings and back; large yellow bill with black ring above red tip; pale yellow eyes with red orbital ring; short yellow legs and feet; long wings; telltale short black tail with white edge.
Gull-billed Tern: Lightest North American tern. Black cap that extends below eyes, down nape; pale gray upperparts that are darker at the wingtips; short, stout black bill and black legs, feet; long wings with very long outer primaries. Direct flight with graceful, shallow wing beats.
Slaty-backed Gull: This large gull has a slate-gray back, white head, belly, tail, and upper wings; dark outer primaries separated from mantle by row of white spots. Gray underside of primaries; broad white trailing edge to wings. It has pink legs and feet, yellow eyes with red orbital ring and a yellow bill with red spot near tip. Diet includes fish, crustaceans and insects. Sexes are similar.
Ross's Gull: The pink gull of the high Arctic. Small gull, pale gray upperparts, gray-white nape, white neck with thin black collar, and white, wedge-shaped tail; underparts are variably pink. Black bill is very short; legs, feet are orange-red. Often feeds on mudflats like a wader.
Sandwich Tern: This is the only medium-sized tern with a long slender black bill tipped with yellow. The upperparts are very pale gray, nearly white, and the underparts are white. The black crown has a short black crest, the white tail is deeply forked, and the legs and feet are black. It has a direct flight and hovers before diving for fish. Sexes are similar.
Yellow-legged Gull: Large white gull, medium gray upperparts and red spot on bright yellow bill; legs and feet are yellow. Tail is white. Wades or makes shallow dives to catch food, steals, scavenges. Strong, direct flight with deep, steady wing beats. Rides thermals and updrafts, sometimes hovers.
 
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