Restart Bird Identification Expert

What was the SIZE of the Gray Gull-like bird you saw in South Dakota?



Long-tailed Jaeger: Smallest but most buoyant and graceful jaeger or skua, with gray upperparts, white breast and gray belly. Black cap covers eyes, crosses chin and ends at yellow nape. Upperwings are dark edged. Tail is gray with black edges and long black streamers. Legs are blue-gray and toes are webbed. Sexes are similar. Juvenile is heavily barred and spotted gray; has white patches on underwings, white throat, white belly and dark-tipped gray bill. Dark juvenile is darker overall; has gray throat and lacks white belly.
Black-legged Kittiwake: This is a medium-sized white gull with pale gray back and upperwings and black wing tips. The bill is yellow and the legs and feet are black. It has a swift, graceful flight, alternating several rapid shallow wing beats with a glide. Hovers over water before diving for prey at the surface. It feeds on marine invertebrates, plankton and fish. The sexes look very similar.
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.
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.
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.
Iceland Gull: Large, white gull, pale, pearl-gray back and upper wings. Bill is yellow, red spot at tip of lower mandible. Wing tips sometimes marked with pale to dark gray. White tail; legs and feet are pink. Direct flight with strong deep wing beats. Soars on thermals and updrafts. Thayer's Gull, formerly its own species is now a subspecies of the Iceland Gull.
Glaucous Gull: This large white gull has a pale gray back and yellow eyes. The bill is yellow with a red spot on the lower mandible. The wings are white-edged and white tipped; the legs and feet are pink. It is an active predator of seabird nesting colonies. Diet includes fish, insects and birds. It has slow steady wing beats and soars on thermals and updrafts. The sexes are similar.
Arctic Tern: This is a medium-sized, slim tern with gray upperparts, black cap, a white rump and throat, and pale gray underparts. The tail is deeply forked and white with dark edged outer feathers. The bill is dark red. The legs and feet are red. It has a buoyant, graceful flight with steady wing beats. It feeds on small fish, crustaceans and insects. Both sexes are similar in appearance.
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.
 
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